And this gets a bit bloody hard too! I’ve been working through Basic, and am now up to level 12 or 13, but since level 10 the colours don’t “run” from, say, blue to red – they cycle round, red-blue-yellow-red. This means that certain colours can’t be changed by other colours. For instance, if you’re on an orange one, and you make it “more blue”, you get a black, unchangeable, block instead. Erk! It isn’t “basic” any more!