With a little help from Madman we did this one pretty quickly. Space invaders are pretty easy to do but they still look cool.
Just a side note, we had a problem transfering the yellow octopus invader. We checked both my sketch and the wall several times over and the messurements were correct but they weren't (if that makes any sense). We were really puzzelled by it. The eyes should have been two spaces up but they couldn't be.
Couldn't wrap our heads around it.