I turned an old meme into a printable sign.

The upper half (text, picture and border) is intended to be printed in another color. You don't need the MMU for this, just change the filament after the base is completed.

Print instructions

The .gcode file contains the filament change command at the right position and is ready to print.
The .3mf file has the filament change set if opened in PrusaSlicer (not slic3r PE), however, you'll need to adjust it if you change the layer hight.
If you slice manually and don't know how the color change in PrusaSlicer works watch this: https://youtu.be/bzf20FxsN2Q?t=361