Newbie with Pi3

[buran]

so actually when door is open it constantly prints STOP door open and when it is closed - it non-stop prints STOP door closed

what pins 11 and 12 (the top and botom switch) are doing? what pins 15 and 13 are doing? how it detects to stop motor (opening/closing)? sorry, not an expert in GPIO :-)

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OK, I entertain the idea of buying RPi for a log time so this is also interesting to me.
I did some raeding on GPIO, so please confirm if my understanding is correct:
when pin is IN, you get information from it, when it is OUT - you send info to whatever is connected. When HIGH it is powered.

• pin7 is light sensor. When it is LOW (False) - there is light, when it is HIGH (True) - there is no light detected.
  
• pin 11 and 12 are switches that detect the door is open/closed. When respective switch is HIGH (true) the door is already
  open/closed. i.e. while the door is open switch 11 is non-stop powered and in state HIGH
  
• 15 and 13 are motors. 15 drives the motor to open the door. 13 powers the motor to close it. I don't know if the same motor with different direction of movement or different motors driving in one direction only. I guess 2 motors, because when pin 11 is HIGH, you actually sending non-stop info to pin 15 to stay LOW (False).
  Is that correct. Please correct me if not.
  
  
  

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Also, if you set OUT pin HIGH, it stays so, until set LOW, right?