E8

float x = 0;

float y = 0;

float s = 0;

float col = 20;

​

void setup() {

  background(47, 86, 137);

  size(400, 400, P2D);

  smooth(4);

}

​

void draw(){

  if(mousePressed && x < width) {

  stroke(0);

  strokeWeight(s);  

  ellipse(width/2, height/2, x, y);

  x++;

  y++;

  s = s + 0.05;

  col++;

  } 

    fill(0, col, 0);

  ellipse(width/2, height/2, x, y);

  }

  void mouseReleased(){

    x = 0;

    y = 0;

    s = 0;

    col = 20;

    background(47, 86, 137);

  }