Hi

void setup() {

  size(400,300);

  fill(255);

  smooth();

}

​

//This sets up the sketch's size and background color

​

void draw() {

  background(200);

  ellipse(mouseX,mouseY,20,20);

  if (mousePressed) {

    if (mouseButton == RIGHT) {

      fill(0,0,255);

      noStroke();

      ellipse(pmouseX,pmouseY,20,20);

/*

This sets up the beginning part of the sketch, where an ellipse

will follow the cursor around the screen (it also provides a primary

effect of color when the indicated button on the mouse is clicked)

*/

​

    }else{

         rect(30,30,50,50);

         rect(30,80,50,50);

         rect(30,130,50,50);

         rect(30,180,50,50);

         rect(80,100,50,50);

         rect(120,30,50,50);

         rect(120,80,50,50);

         rect(120,130,50,50);

         rect(120,180,50,50);

         rect(200,30,50,50);

         rect(200,180,50,50);

         rect(250,30,50,50);

         rect(250,80,50,50);

         rect(250,130,50,50);

         rect(250,180,50,50);

         rect(300,30,50,50);

         rect(300,180,50,50);

/*

This list adds the little greeting that can be seen when clicking         

*/

    }

}

       if (mouseButton == LEFT) {

        fill(80,18,32);

        noStroke();

        ellipse(mouseX,mouseY,20,20);

      }

}

​

/*

This final piece sets up the last addition of color when the second

mouse button is clicked, adding a bit pf a strobe effect if both

buttons are clicked in rapid succession!

*/

​

​