3D Animation in Minecraft without Mods

Using custom mob spawners, I made an animation of a tree growing. World download: https://www.dropbox.com/s/7uguttpg81jiawh/3danimation.zip?dl=1 Filter download: https://www.dropbox.com/s/zdbzq5vhfy31des/animator.py?dl=1 Video showing how the spawners spawn the structure: http://www.youtube.com/watch?v=sMZGOu3VmAY Music at the end is Cipher by Kevin MacLeod