Open your FNF mod project in your engine or editor
Find the stage or background files for the song
Create or collect Baldi-themed background assets
Draw a school hallway, classroom, or Baldi’s school setting
Add simple flat colors and low-detail textures to match Baldi’s style
Include school props like lockers, desks, chalkboards, doors, and signs
Add Baldi character elements if needed, such as posters or cutouts
Make sure the background layers are separated for parallax
Export each layer as a transparent PNG
Import the PNG files into your FNF project
Set the background sprites in the stage script or JSON
Adjust the position, scale, and scroll factor of each layer
Test the background in-game
Fix alignment, layering, and visibility issues
Add subtle animations if desired, like flickering lights or moving objects
Save and package the stage with your mod