update = 7;
newplane = 12;
width = 15;
height = 15;
exit: ( 7 0 x ) ( 14 0 z ) ( 12 14 q ) ( 0 14 e ) ;
beacon: ( 12 7 ) ;
airport: ( 7 8 w ) ;
line: [ ( 1 1 ) ( 6 6 ) ]
[ ( 7 9 ) ( 12 14 ) ]
[ ( 7 0 ) ( 7 14 ) ]
[ ( 1 7 ) ( 11 7 ) ] ;