​

function setup() {

  createCanvas(400, 400);

  img = loadImage("arrow.jpg");

  imageMode(CENTER);

}

​

function draw() {

  background(220);

  push();

  translate(width/2, height/2);

  rotate(atan2(-(height/2 - mouseY), -(width/2 - mouseX)));

  image(img, 0, 0, 100, 100);

  pop();

}