[Tutorial] Use crowbar to open a door

[Cranky Old Man]

I hope it's bit better now If not tell me what I should change

Changing all the names to be more generic, is only taking care of the easy part.
The next general step in what you could change, is for you to understand the code itself, because what kind of bugs me, is that you don't show any understanding of what you teach. You have extracted some code from the FG code, and that's great, but there are many ways in which this code can be made more comprehensible.

It doesn't bother me that much. I saw this topic before and I just shrugged at it without commenting on it, so I don't mind if you don't understand it.