Can you do something similar to Calamity mod?

[Jaminton2007]

I would like to know if it is possible to create a mod based on this code, a mod similar to the calamity, but I do not have enough knowledge to know if it is possible or not.

[Arsen1yGD]

Someone probably doing it I know.

[Hexagonforce12]

It seems very difficult because coding mods in TL Pro only uses JavaScript 💀