function CubeEntity() {
  Entity.call(this);

  this.add(POSITION);
  this.position.position = new Vec3(1, 0, 0);
  this.add(MESH);
  this.add(MATERIAL);
}

CubeEntity.prototype = Object.create(Entity.prototype);
CubeEntity.prototype.constructor = CubeEntity;

CubeEntity.prototype.update = function() {
  var speed = 3.0;
  var move = Input.axis2D(INPUT_ACTION_LEFT, INPUT_ACTION_RIGHT, INPUT_ACTION_UP, INPUT_ACTION_DOWN);
  var pos = this.position.position;
  this.position.position = new Vec3(
    pos.x + move.x * speed * TIME.delta,
    pos.y,
    pos.z + move.y * speed * TIME.delta
  );
  this.material.setColor(Color.rainbow());
};

module = CubeEntity;