Do you want to see Pennywise the Dancing Clown from the horror movie IT in Minecraft Pocket Edition? Well you can learn to do just that by watching the video I made.
All you need to do is download and install the IT Clown addon for Minecraft PE. You can get it from MCPEDL or other sites dedicated to mcpe addons and stuff.
Once you get the addon installed, just create a new world and load the resource packs. I personally prefer to use the addon on a haunted mansion as it gives the proper IT feel to it. Anyways, here's a video showing how to spawn Pennywise in Minecraft Pocket Edition.