A simple "Do Not Disturb" type of sign

A multi-colour print of a “Do Not Enter” sign for hanging on a door knob.

The gcode file is for a Prusa Mini/Mini+

Assuming that you're printing in White & Red as shown in the renderings:

1)  Start with the White filament loaded on your Prusa Mini or Prusa Mini+

2)  About 25 minutes after it started printing, your Mini/Mini+ will begin the process of ejecting the White filament and then prompt you to insert the next filament (i.e. Red in my example).

3)  After about 9 minutes, the Red text (consisting of two layers) is finished and your Mini will start ejecting the Red filament and then prompt you to insert the next filament (i.e. White in my example).

4)  Since that was the final filament change, you just need to sit back and let the remainder of your print complete.