void setup(){
  size(500,500); 
  frameRate(10);
}
 
void draw(){
  background(255);
 
  float randomness = map(mouseX, 0,width, 0,1);
  randomness = constrain(randomness, 0,1); 
  float randomColors = map(mouseX, 0,width, 0,255);
  randomColors = constrain(randomColors, 0,255);
  color randomBall = color (255,255,255);
 
  for (int i=1; i < 17; i++){
    for (int j=1; j < 17; j++){
      float x = (i*30)  + randomness * random(-30,30); 
      float y = (j*30)  + randomness * random(-30,30);
      ellipseMode(CENTER);
      randomBall = color(random(0,randomColors),
      random(0,randomColors),random(0,randomColors),100);
      float randomSize = 20 + randomness * random(-20,20);
      fill(randomBall);
      ellipse(x,y,randomSize,randomSize); 
    }
  }
}