雫

function setup() {

  createCanvas(600, 600);

  background(0);

  button = createButton('increase');

  button.position(0, 0);

  button.mousePressed(changeBG);

}

​

function changeBG() {

  for(i=0; i<3; i++){

  let x = random(600);

  let y = random(600);

  let radius = random(40,80);

  let cou = 0;

  fill(0, random(150,255), random(127,255), 20);

  noStroke();

      setTimeout(en,150);

      function en(){

    circle(x,y,radius);

    radius = radius * 1.1;

    if(cou < 10){

    setTimeout(en,150);

      cou += 1;

      }

    }

  }

}