Next, I covered each side using my washi tape. I adhered it to the block and cut off the excess. For the tiny triangles, I placed a strip of washi tape on my cutting mat and used a metal ruler and my razor to cut them before I adhered them.
The patterns I used are pictured above: two solid sides, two sides with two large triangles, and two sides with four triangles.
As a final step, I sealed each side with Mod Podge, so the tape can't come off.