I really struggled to come up with any ideas for this one, then I began focusing on the geometric shapes and bright colours and this sprung to mind
Finally I had a sketch challenge to complete with about 20 minutes to go before the upload deadline!
And finally, I have the template to share for the centre-step fold card. I've converted the dimensions from those over on splitcoast for the UK sizes of card (all of theirs assume letter!) (If you click on the image it should enlarge!)