Geometrics are such a treat. . .no background! It is fun to colour plan on paper, several different ways, by using coloured pencils or crayons. Generally, you will see more than 1 way to view it, and decide which view will be dominant, before actually choosing wools. I found this hooked up very quickly, using a 7 cut for most of it, and small bits of 3 cut for bright accents.

Here is a light and cheerful version done by Nancy Diegel.