​

function setup() {

  createCanvas(400, 400);

  x = 0;

}

​

function draw() {

  background(220);

  speed(1,1);

  drawCircle();

}

​

function speed(s,b) {

  return (s+b)

}

​

function drawCircle() {

  ellipse(x, 200, 50, 50);

}

​