I can't find it either! It looks like they rearranged everything on their site, and now I can't even find it with a search
Here's the link to the code itself, but it doesn't have the instructions that go with it...
You need to be able to compile it on a (maybe old...?) Windows machine, need the right DLL (might be in the project), need a Wiimote, and it's important to get a powerful IR light bulb (single point source is best) in the right frequency - I think people have figured that out above.
The Arduino code may be lost but it's unnecessary - it was good for doing a littleBits-only smart switch for multiple wand movements. You can also use IFTTT as a switch for multiple spells (instead of the CloudBit).