Thanks guys,
I just figured it out.
I was wondering if you guys have a better suggestion on how to change maps relatively.
What I mean is when I am on map A I should shift to map B while going to the right, but if I am already on map B I should change to map C.
For now I am just filling my script with "if"s and "||"s, but I feel that it is not the cool way to do this...