I really like spitzspot's temperature tower but I needed to test more temperatures. So I took his design into TinkerCAD and worked on it a bit to provide a range from 180 degrees to 250 degrees. I cleaned them up in MeshMixer after exporting from TinkerCAD. I've included 3 towers each with a different range as well as all the individual pieces so it is easy to create any tower you want.
This is the very first time I've posted anything and I'm very new to the 3D creation tools. So, if you find any errors, feel free to let me know and to remix them yourself.
The bottom plate is 1mm now. Each temperature piece is 10mm. Set your first temperature change at 11mm, then 21mm, 31mm, etc.