Kirsten,
We don't dole out working solutions to problems, but we are always very keen to help you get there.

Here's a first clue.

Assembler knows nothing except to execute instructions one after another, unless something says jump
somewhere else.

First step:
Isolate the start, initialisation and subroutines in your code. Put comments in.
Write, at the beginning of your subroutines the ARGUMENTS that your subs take, so you can CALL them later.