X-ray Potion in Minecraft 1.8

Using some redstone and command blocks, I create a potion that lets you see through stone to find ores and other block types. I realized after the fact that there are a lot of better ways to do this (like summoning and using a Witherskull for the execute point), but the mechanic still has a lot of potential and might inspire people. X-ray potion schematic: Is gone forever. Sorry, lost the file. Please note that I will not be able to respond to any comments you may post.