diff --git a/Lektion 2/Kollisionserkennung/1_FarbButtons/FarbButtons.pde b/Lektion 2/Kollisionserkennung/1_FarbButtons/FarbButtons.pde
new file mode 100644
index 0000000..7fcd1a3
--- /dev/null
+++ b/Lektion 2/Kollisionserkennung/1_FarbButtons/FarbButtons.pde	
@@ -0,0 +1,64 @@
+int size = 150;
+
+void setup() {
+    size(570, 570);
+    noStroke();
+    background(220);
+}
+
+void draw() {
+    int x1 = width / 2 - size / 2;
+    int y1 = 105 - size / 2;
+    int x2 = x1;
+    int y2 = 285 - size / 2;
+    int x3 = x1;
+    int y3 = 475 - size / 2;
+    
+    // setze Buttons
+    drawButton(x1, y1, color(255, 0, 0), "Rot");
+    drawButton(x2, y2, color(0, 255, 0), "Grün");
+    drawButton(x3, y3, color(0, 0, 255), "Blau");
+    
+    // Klick außerhalb der Elemente
+    if (!(x1 <= mouseX && 
+        y1 <= mouseY && 
+        mouseX <= x1 + size && 
+        mouseY <= y1 + size) && 
+        !(x2 <= mouseX && 
+        y2 <= mouseY && 
+        mouseX <= x2 + size && 
+        mouseY <= y2 + size) && 
+        !(x3 <= mouseX && 
+        y3 <= mouseY && 
+        mouseX <= x3 + size && 
+        mouseY <= y3 + size)) {
+        
+        if (mousePressed) {
+            background(220);
+        }
+    }
+}
+
+void drawButton(int x, int y, color paint, String title) {
+    // setze Füllfarbe ...
+    if (x <= mouseX && 
+        y <= mouseY && 
+        mouseX <= x + size && 
+        mouseY <= y + size) {
+        if (mousePressed) {
+            background(paint);
+        }
+        
+        fill(200);
+    } 
+    // setze Rechteck
+    rect(x, y, size, size);
+    
+    // setze Text
+    fill(0);
+    textAlign(CENTER);
+    text(title, x + size / 2, y + size / 2);
+    
+    
+    fill(255);
+}
\ No newline at end of file
diff --git a/Lektion 2/Kollisionserkennung/1_FarbButtons/out/FarbButtons.class b/Lektion 2/Kollisionserkennung/1_FarbButtons/out/FarbButtons.class
new file mode 100644
index 0000000..e0aa543
Binary files /dev/null and b/Lektion 2/Kollisionserkennung/1_FarbButtons/out/FarbButtons.class differ
diff --git a/Lektion 2/Kollisionserkennung/1_FarbButtons/out/source/FarbButtons.java b/Lektion 2/Kollisionserkennung/1_FarbButtons/out/source/FarbButtons.java
new file mode 100644
index 0000000..a347c4a
--- /dev/null
+++ b/Lektion 2/Kollisionserkennung/1_FarbButtons/out/source/FarbButtons.java	
@@ -0,0 +1,93 @@
+/* autogenerated by Processing revision 1293 on 2023-09-27 */
+import processing.core.*;
+import processing.data.*;
+import processing.event.*;
+import processing.opengl.*;
+
+import java.util.HashMap;
+import java.util.ArrayList;
+import java.io.File;
+import java.io.BufferedReader;
+import java.io.PrintWriter;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.IOException;
+
+public class FarbButtons extends PApplet {
+
+int size = 150;
+
+public void setup() {
+    /* size commented out by preprocessor */;
+    noStroke();
+    background(220);
+}
+
+public void draw() {
+    int x1 = width / 2 - size / 2;
+    int y1 = 105 - size / 2;
+    int x2 = x1;
+    int y2 = 285 - size / 2;
+    int x3 = x1;
+    int y3 = 475 - size / 2;
+    
+    drawButton(x1, y1, color(255, 0, 0), "Rot");
+    drawButton(x2, y2, color(0, 255, 0), "Grün");
+    drawButton(x3, y3, color(0, 0, 255), "Blau");
+    
+    // Klick außerhalb der Elemente
+    if (!(x1 <= mouseX && 
+        y1 <= mouseY && 
+        mouseX <= x1 + size && 
+        mouseY <= y1 + size) && 
+        !(x2 <= mouseX && 
+        y2 <= mouseY && 
+        mouseX <= x2 + size && 
+        mouseY <= y2 + size) && 
+        !(x3 <= mouseX && 
+        y3 <= mouseY && 
+        mouseX <= x3 + size && 
+        mouseY <= y3 + size)) {
+        
+        if (mousePressed) {
+            background(220);
+        }
+    }
+}
+
+public void drawButton(int x, int y, int paint, String title) {
+    // setze Füllfarbe ...
+    if (x <= mouseX && 
+        y <= mouseY && 
+        mouseX <= x + size && 
+        mouseY <= y + size) {
+        if (mousePressed) {
+            background(paint);
+        }
+        
+        fill(200);
+    } 
+    // setze Rechteck
+    rect(x, y, size, size);
+    
+    // setze Text
+    fill(0);
+    textAlign(CENTER);
+    text(title, x + size / 2, y + size / 2);
+    
+    
+    fill(255);
+}
+
+
+  public void settings() { size(570, 570); }
+
+  static public void main(String[] passedArgs) {
+    String[] appletArgs = new String[] { "FarbButtons" };
+    if (passedArgs != null) {
+      PApplet.main(concat(appletArgs, passedArgs));
+    } else {
+      PApplet.main(appletArgs);
+    }
+  }
+}
diff --git a/Lektion 2/Kollisionserkennung/2_rectMode/out/rectMode.class b/Lektion 2/Kollisionserkennung/2_rectMode/out/rectMode.class
new file mode 100644
index 0000000..11211bd
Binary files /dev/null and b/Lektion 2/Kollisionserkennung/2_rectMode/out/rectMode.class differ
diff --git a/Lektion 2/Kollisionserkennung/2_rectMode/out/source/rectMode.java b/Lektion 2/Kollisionserkennung/2_rectMode/out/source/rectMode.java
new file mode 100644
index 0000000..45af315
--- /dev/null
+++ b/Lektion 2/Kollisionserkennung/2_rectMode/out/source/rectMode.java	
@@ -0,0 +1,75 @@
+/* autogenerated by Processing revision 1293 on 2023-09-27 */
+import processing.core.*;
+import processing.data.*;
+import processing.event.*;
+import processing.opengl.*;
+
+import java.util.HashMap;
+import java.util.ArrayList;
+import java.io.File;
+import java.io.BufferedReader;
+import java.io.PrintWriter;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.IOException;
+
+public class rectMode extends PApplet {
+
+int size = 150; // Durchmesser
+
+public void setup() {
+    /* size commented out by preprocessor */;
+    noStroke();
+    background(220);
+}
+
+public void draw() {
+    drawButton(width / 2, 105, color(255, 0, 0), "Rot");
+    drawButton(width / 2, 285, color(0, 255, 0), "Grün");
+    drawButton(width / 2, 475, color(0, 0, 255), "Blau");
+    
+    // Klick außerhalb der Elemente
+    if (dist(mouseX, mouseY, width / 2, 105) > size / 2 && 
+        dist(mouseX, mouseY, width / 2, 285) > size / 2 && 
+        dist(mouseX, mouseY, width / 2, 475) > size / 2) {
+        
+        if (mousePressed) {
+            background(220);
+        }
+    }
+}
+
+public void drawButton(int x, int y, int paint, String title) {
+    // setze Füllfarbe ...
+    if (dist(mouseX, mouseY, x, y) < size / 2) {
+        if (mousePressed) {
+            background(paint);
+        }
+        
+        fill(200);
+    } 
+    // setze Rechteck
+    rectMode(CENTER);
+    rect(x, y, size, size);
+    
+    // setze Text
+    fill(0);
+    textAlign(CENTER);
+    text(title, x, y);
+    
+    
+    fill(255);
+}
+
+
+  public void settings() { size(570, 570); }
+
+  static public void main(String[] passedArgs) {
+    String[] appletArgs = new String[] { "rectMode" };
+    if (passedArgs != null) {
+      PApplet.main(concat(appletArgs, passedArgs));
+    } else {
+      PApplet.main(appletArgs);
+    }
+  }
+}
diff --git a/Lektion 2/Kollisionserkennung/2_rectMode/rectMode.pde b/Lektion 2/Kollisionserkennung/2_rectMode/rectMode.pde
new file mode 100644
index 0000000..76f1875
--- /dev/null
+++ b/Lektion 2/Kollisionserkennung/2_rectMode/rectMode.pde	
@@ -0,0 +1,46 @@
+int size = 150; // Durchmesser
+
+void setup() {
+    size(570, 570);
+    noStroke();
+    background(220);
+}
+
+void draw() {
+    // setze Buttons
+    drawButton(width / 2, 105, color(255, 0, 0), "Rot");
+    drawButton(width / 2, 285, color(0, 255, 0), "Grün");
+    drawButton(width / 2, 475, color(0, 0, 255), "Blau");
+    
+    // Klick außerhalb der Elemente
+    if (dist(mouseX, mouseY, width / 2, 105) > size / 2 && 
+        dist(mouseX, mouseY, width / 2, 285) > size / 2 && 
+        dist(mouseX, mouseY, width / 2, 475) > size / 2) {
+        
+        if (mousePressed) {
+            background(220);
+        }
+    }
+}
+
+void drawButton(int x, int y, color paint, String title) {
+    // setze Füllfarbe ...
+    if (dist(mouseX, mouseY, x, y) < size / 2) {
+        if (mousePressed) {
+            background(paint);
+        }
+        
+        fill(200);
+    } 
+    // setze Rechteck
+    rectMode(CENTER);
+    rect(x, y, size, size);
+    
+    // setze Text
+    fill(0);
+    textAlign(CENTER);
+    text(title, x, y);
+    
+    
+    fill(255);
+}
\ No newline at end of file
diff --git a/Lektion 2/Kollisionserkennung/3_UeberlappendeButtons/UeberlappendeButtons.pde b/Lektion 2/Kollisionserkennung/3_UeberlappendeButtons/UeberlappendeButtons.pde
new file mode 100644
index 0000000..a07da3e
--- /dev/null
+++ b/Lektion 2/Kollisionserkennung/3_UeberlappendeButtons/UeberlappendeButtons.pde	
@@ -0,0 +1,35 @@
+int x1 = 200;
+int y1 = 100;
+int x2 = 100;
+int y2 = 200;
+int size = 200;
+
+void setup() {
+    size(800, 600);
+}
+
+void draw() {
+    // setze hintergrund
+    background(255);
+    noFill();
+    
+    // setze rechtecke
+    rect(x1, y1, size, size);
+    rect(x2, y2, size, size);
+    
+    // pruefung ob mauszeiger in rechteck ist
+    boolean isInRect1 = mouseX >= x1 && mouseY >= y1 && mouseX <= x1 + size && mouseY <= y1 + size;
+    boolean isInRect2 = mouseX >= x2 && mouseY >= y2 && mouseX <= x2 + size && mouseY <= y2 + size;
+    
+   if (isInRect1 && isInRect2) { // mauszeiger in schnittmenge
+      fill(0, 0, 255);
+   } else if (isInRect1) { // mauszeiger in rechteck 1
+      fill(255, 0, 0);
+   } else if (isInRect2) { // mauszeiger in rechteck 2
+      fill(0, 255, 0);
+   } else {
+      noFill(); // mauszeiger außerhalb der rechtecke
+   }
+    
+    ellipse(mouseX, mouseY, 20, 20);
+}
\ No newline at end of file
diff --git a/Lektion 2/Kollisionserkennung/3_UeberlappendeButtons/out/UeberlappendeButtons.class b/Lektion 2/Kollisionserkennung/3_UeberlappendeButtons/out/UeberlappendeButtons.class
new file mode 100644
index 0000000..799f662
Binary files /dev/null and b/Lektion 2/Kollisionserkennung/3_UeberlappendeButtons/out/UeberlappendeButtons.class differ
diff --git a/Lektion 2/Kollisionserkennung/3_UeberlappendeButtons/out/source/UeberlappendeButtons.java b/Lektion 2/Kollisionserkennung/3_UeberlappendeButtons/out/source/UeberlappendeButtons.java
new file mode 100644
index 0000000..c29ab03
--- /dev/null
+++ b/Lektion 2/Kollisionserkennung/3_UeberlappendeButtons/out/source/UeberlappendeButtons.java	
@@ -0,0 +1,65 @@
+/* autogenerated by Processing revision 1293 on 2023-09-27 */
+import processing.core.*;
+import processing.data.*;
+import processing.event.*;
+import processing.opengl.*;
+
+import java.util.HashMap;
+import java.util.ArrayList;
+import java.io.File;
+import java.io.BufferedReader;
+import java.io.PrintWriter;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.IOException;
+
+public class UeberlappendeButtons extends PApplet {
+
+int x1 = 200;
+int y1 = 100;
+int x2 = 100;
+int y2 = 200;
+int size = 200;
+
+public void setup() {
+    /* size commented out by preprocessor */;
+}
+
+public void draw() {
+    // setze hintergrund
+    background(255);
+    noFill();
+    
+    // setze rechtecke
+    rect(x1, y1, size, size);
+    rect(x2, y2, size, size);
+    
+    // pruefung ob mauszeiger in rechteck ist
+    boolean isInRect1 = mouseX >= x1 && mouseY >= y1 && mouseX <= x1 + size && mouseY <= y1 + size;
+    boolean isInRect2 = mouseX >= x2 && mouseY >= y2 && mouseX <= x2 + size && mouseY <= y2 + size;
+    
+   if (isInRect1 && isInRect2) { // mauszeiger in schnittmenge
+      fill(0, 0, 255);
+   } else if (isInRect1) { // mauszeiger in rechteck 1
+      fill(255, 0, 0);
+   } else if (isInRect2) { // mauszeiger in rechteck 2
+      fill(0, 255, 0);
+   } else {
+      noFill(); // mauszeiger außerhalb der rechtecke
+   }
+    
+    ellipse(mouseX, mouseY, 20, 20);
+}
+
+
+  public void settings() { size(800, 600); }
+
+  static public void main(String[] passedArgs) {
+    String[] appletArgs = new String[] { "UeberlappendeButtons" };
+    if (passedArgs != null) {
+      PApplet.main(concat(appletArgs, passedArgs));
+    } else {
+      PApplet.main(appletArgs);
+    }
+  }
+}
diff --git a/Lektion 2/Kollisionserkennung/4_KollisionPunktLinie/KollisionPunktLinie.pde b/Lektion 2/Kollisionserkennung/4_KollisionPunktLinie/KollisionPunktLinie.pde
new file mode 100644
index 0000000..8b06ff7
--- /dev/null
+++ b/Lektion 2/Kollisionserkennung/4_KollisionPunktLinie/KollisionPunktLinie.pde	
@@ -0,0 +1,28 @@
+float ax = 50; // x-Position von Punkt a
+
+float bx = 5; // x-Position des Startpunkts der Linie b
+float bwidth = 30; // Breite der Linie b
+
+void draw() {
+    background(0);
+    strokeWeight(5);
+    
+    stroke(0,255,0);
+    point(ax, ax); // setze punkt
+    
+    if (bx + bwidth >= ax && bx <= ax) { // wenn linie innerhalb x von punkt
+        stroke(255, 0, 0); // setze farbe auf rot
+    } else {
+        stroke(255); // setze farbe auf weiß
+    }
+    
+    line(bx, 60, bx + bwidth, 60); // setze linie
+    
+    if (keyPressed) {
+        if(keyCode == LEFT) {
+            bx -= 2;
+    } else if (keyCode == RIGHT) {
+            bx += 2;
+    }
+}
+}
\ No newline at end of file
diff --git a/Lektion 2/Kollisionserkennung/4_KollisionPunktLinie/out/KollisionPunktLinie.class b/Lektion 2/Kollisionserkennung/4_KollisionPunktLinie/out/KollisionPunktLinie.class
new file mode 100644
index 0000000..2cf03fe
Binary files /dev/null and b/Lektion 2/Kollisionserkennung/4_KollisionPunktLinie/out/KollisionPunktLinie.class differ
diff --git a/Lektion 2/Kollisionserkennung/4_KollisionPunktLinie/out/source/KollisionPunktLinie.java b/Lektion 2/Kollisionserkennung/4_KollisionPunktLinie/out/source/KollisionPunktLinie.java
new file mode 100644
index 0000000..7bb0b5c
--- /dev/null
+++ b/Lektion 2/Kollisionserkennung/4_KollisionPunktLinie/out/source/KollisionPunktLinie.java	
@@ -0,0 +1,56 @@
+/* autogenerated by Processing revision 1293 on 2023-09-27 */
+import processing.core.*;
+import processing.data.*;
+import processing.event.*;
+import processing.opengl.*;
+
+import java.util.HashMap;
+import java.util.ArrayList;
+import java.io.File;
+import java.io.BufferedReader;
+import java.io.PrintWriter;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.IOException;
+
+public class KollisionPunktLinie extends PApplet {
+
+float ax = 50; // x-Position von Punkt a
+
+float bx = 5; // x-Position des Startpunkts der Linie b
+float bwidth = 30; // Breite der Linie b
+
+public void draw() {
+    background(0);
+    strokeWeight(5);
+    
+    stroke(0,255,0);
+    point(ax, ax);
+    
+    if (bx + bwidth >= ax && bx <= ax) {
+        stroke(255, 0, 0);
+    } else {
+        stroke(255);
+    }
+    
+    line(bx, 60, bx + bwidth, 60);
+    
+    if (keyPressed) {
+        if(keyCode == LEFT) {
+            bx -= 2;
+    } else if (keyCode == RIGHT) {
+            bx += 2;
+    }
+}
+}
+
+
+  static public void main(String[] passedArgs) {
+    String[] appletArgs = new String[] { "KollisionPunktLinie" };
+    if (passedArgs != null) {
+      PApplet.main(concat(appletArgs, passedArgs));
+    } else {
+      PApplet.main(appletArgs);
+    }
+  }
+}
diff --git a/Lektion 2/Kollisionserkennung/5_KollisionLinieLinie/KollisionLinieLinie.pde b/Lektion 2/Kollisionserkennung/5_KollisionLinieLinie/KollisionLinieLinie.pde
new file mode 100644
index 0000000..d1ee262
--- /dev/null
+++ b/Lektion 2/Kollisionserkennung/5_KollisionLinieLinie/KollisionLinieLinie.pde	
@@ -0,0 +1,33 @@
+float ax = 60; // x-Position des Startpunkts der Linie a
+float awidth = 30; // Breite der Linie a
+
+float bx = 5; // x-Position des Startpunkts der Linie b
+float bwidth = 40; // Breite der Linie b
+
+void setup() {
+    size(150, 100);
+}
+
+void draw() {
+    background(0);
+    strokeWeight(4);
+    
+    stroke(0,255,0);
+    line(ax, 50, ax + awidth, 50); // setze linie
+    
+    stroke(255);
+    
+    if (bx + bwidth >= ax && bx <=  ax + awidth) { // wenn line b unter linie a
+        stroke(255, 0, 0); // setze farbe auf rot
+    }
+    
+    line(bx, 60, bx + bwidth, 60);
+    
+    if (keyPressed) {
+        if(keyCode == LEFT) {
+            bx -= 2;
+    } else if (keyCode == RIGHT) {
+            bx += 2;
+    }
+}
+}
\ No newline at end of file
diff --git a/Lektion 2/Kollisionserkennung/5_KollisionLinieLinie/out/KollisionLinieLinie.class b/Lektion 2/Kollisionserkennung/5_KollisionLinieLinie/out/KollisionLinieLinie.class
new file mode 100644
index 0000000..f850b8e
Binary files /dev/null and b/Lektion 2/Kollisionserkennung/5_KollisionLinieLinie/out/KollisionLinieLinie.class differ
diff --git a/Lektion 2/Kollisionserkennung/5_KollisionLinieLinie/out/source/KollisionLinieLinie.java b/Lektion 2/Kollisionserkennung/5_KollisionLinieLinie/out/source/KollisionLinieLinie.java
new file mode 100644
index 0000000..f486829
--- /dev/null
+++ b/Lektion 2/Kollisionserkennung/5_KollisionLinieLinie/out/source/KollisionLinieLinie.java	
@@ -0,0 +1,63 @@
+/* autogenerated by Processing revision 1293 on 2023-09-27 */
+import processing.core.*;
+import processing.data.*;
+import processing.event.*;
+import processing.opengl.*;
+
+import java.util.HashMap;
+import java.util.ArrayList;
+import java.io.File;
+import java.io.BufferedReader;
+import java.io.PrintWriter;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.IOException;
+
+public class KollisionLinieLinie extends PApplet {
+
+float ax = 60; // x-Position des Startpunkts der Linie a
+float awidth = 30; // Breite der Linie a
+
+float bx = 5; // x-Position des Startpunkts der Linie b
+float bwidth = 40; // Breite der Linie b
+
+public void setup() {
+    /* size commented out by preprocessor */;
+}
+
+public void draw() {
+    background(0);
+    strokeWeight(4);
+    
+    stroke(0,255,0);
+    line(ax, 50, ax + awidth, 50);
+    
+    stroke(255);
+    
+    if (bx + bwidth >= ax && bx <=  ax + awidth) {
+        stroke(255, 0, 0);
+    }
+    
+    line(bx, 60, bx + bwidth, 60);
+    
+    if (keyPressed) {
+        if(keyCode == LEFT) {
+            bx -= 2;
+    } else if (keyCode == RIGHT) {
+            bx += 2;
+    }
+}
+}
+
+
+  public void settings() { size(150, 100); }
+
+  static public void main(String[] passedArgs) {
+    String[] appletArgs = new String[] { "KollisionLinieLinie" };
+    if (passedArgs != null) {
+      PApplet.main(concat(appletArgs, passedArgs));
+    } else {
+      PApplet.main(appletArgs);
+    }
+  }
+}