Calling Functions: Buggy Code in Python

Inside the code editor we've tried to define and call a function that would print the messages Hey coder! then Welcome back! to the console.

So when we ran the code, we expected it to print:

Hey coder!
Welcome back!

but it seems like we made some mistakes because when we run our code we get a NameError instead.

Assignment:

Your task is to fix our code such that no errors will be produced and it will print the desired output.