Simple 4 colors test.

To practice with multicolor printing, and to help tuning parameters in Bambulab Studio or Orca Slicer, in order to reduce filament waste, without loosing quality.

You can just play with the 4 STL files proposed.

You can reduce the part thickness to 2 or 3 layers thickness, and play with the purge tower parameters to observe results (possible color mixing, time and filament values)

Openscad code is included, to introduce you to this design software, that allows a parametric approach to design, with easy changes and code re-usability.

If you want to know more about Openscad, refer to the PDF file in:
https://www.thingiverse.com/thing:4311079
(exercises from page 22)