Function Ex1

var ex, ey, eyeSize;

​

function setup() {

  createCanvas(600, 600);

  ex = width / 2;

  ey = height / 2;

  eyeSize = 100;

}

​

function draw() {

  background(0);

  noStroke();

​

  drawEye (100,90); 

  drawEye (220,400);

  drawEye (520,200);

}

​

function drawEye(ex, ey) {

  var dy = mouseY - ey;

  var dx = mouseX - ex;

  var orientation = atan2(dy, dx);

​

  push();

  translate(ex, ey);

​

  //white

  fill(255);

  strokeWeight(5);

  circle(0, 0, eyeSize);

  rotate(orientation);

​

  //pupil

  fill(0);

  circle(eyeSize / 4, 0, eyeSize / 2);

  pop();

​

}