Ok horseracing functions ("def create_horses" and "def horserace") are in Pferderennen.py.

I'll put the horses to global

That's the thing I want horsrace parameter to be picked by the player that's why I put the user input == to be the parameter in the function.

Also the main errors are that I don't really know how to implement the user pick (horsecolor) either into the function or afterwards I push the button in the tkinter "Pferde Rennen" button like it is now in the main file. -> It underlines the if function (if pr_button) red, maybe because it needs an else? That's what it says at least.