let Xspeed, Yspeed;

​

​

function setup() {

  createCanvas(400, 400);

  background(220);

  x = 50;

  y = 250;

  Xspeed = 0.1; 

  Yspeed = 0.1;

}

​

function draw() {

  background(220); // comment out to see how the circle moves

  // change location of the circle every frame

  x = x + Xspeed;

  y = y + Yspeed;

  /* every time "draw" function loops, the background and circle are "re-drawn" at a slightly different location, simulating movement*/

  circle(x, y, 50);

}