Added note about tuple ordering

main.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+#(height, width)
 import random as rnd
 from enum import Enum
 
@@ -43,7 +44,7 @@ def nextSquare(passenger, grid):
         if manhattanDistance(passenger.dest, i) < manhattanDistance(passenger.dest, passenger.curr):
             candidati.append(i)
     for i in candidati:
-        if grid[i[0]][i[1]].typ == SquareType.AISLE: #this should work well enough for one aisle plane
+        if grid[i[0]][i[1]].typ == SquareType.AISLE and grid[i[0]][i[1]].occupant != None: #this should work well enough for one aisle plane
             return i
     #todo: implement shufflin'
     return candidati[0]