Render Sequence

push OR append ?

RenderObjectModel

  update()                                // for screen timer
  context.save()                          // save context in stack
  context.globalAlpha = alpha
  context.translate(x, y)
  context.rotate(rotation * Math.PI / 180)
  context.scale(scaleX, scaleY)
  draw()                                  // deep traversal children
  context.restore()                       // restore context