Integer red1;
Integer green1;
Integer blue1;
Boolean isMouseDown = false;
Boolean rotate1 = false;

void setup() {
  translate( width/2, height/2 );
  size( 255, 255 );

}

void draw() {
  rectMode( CENTER );
  noStroke();
  
  red1 = int( mouseY );
  green1 = int( mouseX );
  blue1 = int( mouseY + mouseX );

  if (blue1 >= 255) {
    blue1 = blue1 - 255;
  }

  fill( red1, green1, blue1 );  
  if (isMouseDown) { 
    rotate( (mouseY * mouseX) );
    rect( 128, 128, random(32, 191), random(32, 191) );    
  } else {
    rect( 128, 128, 191, 191 );
  }
  
}

void mousePressed() {
  if (isMouseDown) {
    isMouseDown = false;
  } else {
     isMouseDown = true;
  }
}