let x, y;

//these were variables

​

function setup() {

  createCanvas(400, 400);

  shapeSize = 50;

  x = 0;

  y = 0;

  //initialize your variables

}

function draw() {

  background(220);

  ellipse(x, height / 2, shapeSize, shapeSize);

  ellipse(width / 2, y, shapeSize, shapeSize);

  //experiment with increment or decrement

  x++;

  //this is x=x+1

  y++;

  //RELATIONAL OPERATORS IN CLASS 7 Guide

​

  if (x > width) {

    x = 0;

  }

  if (y > height) {

    y = 0;

  }

}

​