HELP! Programming choises based on a map (Renpy)

[Muwuriel]

Sorry if this is messy, as I'm new to this forum. 

I'm programming a VN where my MC will find people based on where she locates herself on a map of her school.

Example: She can go to "rooftop or cafeteria", and there she will find someone at a random stat percentage of chance.
I need to program how to click on that location on a image that will be static onto the screen until you make a choice, then program the percentage for a person to greet her there.

Can someone help me work this out? Thanks in advance! ;w;

 

[LanThief(HUN)]

Hope this helps.

 

https://www.renpy.org/dl/4.1/tutorial.html

 

If not i'm sorry.