https://youtu.be/vWTf-LEACjw
This is a Harry Potter Platform 9 and 3/4 wall mount that I created during a Live video on YouTube https://youtu.be/o3SCAdoCQCc
It is designed in OpenScad so you can remake it and tweak it.
To print it as is you should put color change points at
3.2, 3.8, and 4.4
0 - 3.0 Black
3.2 - 3.6 Red
3.8 - 4.2 Whte
4.4 - End Black
Actual Filament I used
Black - Hatchbox True Black
Red - Hatchbox True Red
White - Hatchbox True White
The author hasn't provided the model origin yet.