Animation loop

anim.js

// don't have to declare frame, purer
function animate(fn) {
  function anim(frame) {
    fn(frame);
    requestAnimationFrame(_.partial(anim, frame + 1));
  }
  requestAnimationFrame(_.partial(anim, 0));
}


function animate(fn) {
  var frame = 0;
  requestAnimationFrame(function runner() {
    fn(frame);
    frame += 1;
    requestAnimationFrame(runner);
  });
}