let x2,y2,xspeed2,yspeed2;

​

function setup() {

  createCanvas(400, 400);

  x1 = width/2

  y1 = height/2

  xspeed1 = 1

  yspeed1 = 2

  x2 = width/3

  y2 = height/3

  xspeed2 = 2

  yspeed2 = 1

}

​

function draw() {

  background(220);

  x1 += xspeed1

  y1 += yspeed1

  if(x1<0 || x1>width) {

    xspeed1 *= -1

  }

  if (y1<0 || y1>height){

    yspeed1 *= -1

  }

    ellipse(x1,y1,50)

  x2 += xspeed2

  y2 += yspeed2

  if(x2<0 || x2>width) {

    xspeed2 *= -1

  }

  if (y2<0 || y2>height){

    yspeed2 *= -1

  }

    ellipse(x2,y2,50)

​

}