let diameter = 90;

let x;

let y;

​

let a;

let b;

​

function setup() {

  createCanvas(400, 400);

  stroke(2);

  fill("SpringGreen");

​

  x = width / 2;

  y = height / 2;

​

  a = width / 3;

  b = height / 3;

}

​

function draw() {

  background("#EEEEEE");

​

  //le cercle

  x += random(-speed, speed);

  y += random(-speed, speed);

  ellipse(x, y, diameter, diameter);

​

  //le carré

  a += random(-speed, speed);

  b += random(-speed, speed);

  rect(a, b, diameter);

}

​