Is there a way to add background characters

[RealMhin]

Describe your problem here.

im trying to add my friend bg sprites to a bg he made but i don't know how to do it
also this is my first time making a mod using this engine.

Are you modding a build from source or with Lua?

Lua

What is your build target?

Windows x64

Did you edit anything in this build? If so, mention or summarize your changes.

No

[Lorekeeper49]

As in bg characters with singing animations or just background objects with a beat animation?