It doesn't take much fabric to try out a different color in the blocks. 
I decided against the red check from the first picture...it distracted too much from what I wanted to do. My greens are almost identical on purpose... I thought it added to a staircase effect. 
Then I turned the colors and loved the way the red looked like it was falling. 
These bottom two pictures show the same tumbling blocks assembly...just turned to put a different color on the top. 
Amazing what turning the blocks around does to the 3D effect when you look at them. Have fun playing around with your colors...I look forward to seeing what you make!
