An interesting demo of one of the properties of the 'change pen shade by x' block. It appears that the block resets the saturation of colours to full, even if you use it with 0. Apply that to a whole image, and this is what you get. Don't believe me? Check the code, and be astounded when you realise that the only colour manipulation I do is done with a 'change pen shade by 0' block. Credit to @DadOfMrLog / @TheLogFather for explaining this to me whilst working on a separate project
