float maxDistance;
float diameter = 35;
float mouseDist;
float k = 0;



void setup() {
  size(650, 300);
  smooth();
  fill(30,179,200);
  frameRate(75);

  maxDistance = dist(0, 0, width/5, height/6);
}


void draw() {
 
  background(200);

  if (k <= 9.28){
    k += .09;
  }
  else{
    k=0;
  }

  for (float i = 0; i <= width; i += 20) {
    for (float j = 0; j <= height; j += 12) {

      mouseDist = dist(mouseX, mouseY, i, j);

      diameter = (mouseDist / maxDistance) * cos(k+i/100-j/25) * 50;


      fill(mouseY/5, mouseDist, sin(k)* 200);

      ellipse(i, j, diameter, diameter);
    }
  }
}