Overview
I found that picture on internet and I had to bring it to the world of 3d printing. I don't know who is original author of this picture but it is great.
Instruction
When Z is 100% and layer height is 0.2 mm change color at layer 1.2, 2.2, 3.2, 4.2.
Color order:
Update
Added spring Joker. Just stick one end to the Joker and push the other into the base. This is only a concept because I figured out that spring printed with PLA after some time bends and don't keep straight shape so I won't develop this idea more.
Have fun