let y = (200)

​

let xspeed = 4

let yspeed = 3

​

let R 

let G

let B

​

function setup() {

  createCanvas(400, 400);

​

​

R = random(255);

B = random(255);

G = random(255);

}

​

function draw() {

  background(0);

  noStroke()

  fill(R,G,B)

  circle(x,y,50)

  x += xspeed

  y += yspeed

  if (x > width || x < 0){

    xspeed *=- +1

    R = random(255)

    G = random(255)

    B = random(255)

  }

  if (y> height || y < 0){

    yspeed *=- +1

    R = random(255)

    G = random(255)

    B = random(255)

  } 

}