I just taped long strips and wrapped them around the edges. I added a few extra strips of color at places where I felt like an extra color was needed. When I had all the colored tape on there, as an extra precaution, I secured them to the underside of the desk with some clear packing tape. This was absolutely a "stick with it" (no pun intended) project. About a quarter of the way through, it looked so stupid and I worried I was wasting time and money. By the end, I was obsessed.
Find the full instructions at Enjoy It: just for fun / taped work table.
(Images: Elise Blaha)