update = 5;
newplane = 5;
width = 30;
height = 21;

exit:		(  0  0 c ) ( 10  0 x ) ( 29 10 a )
		( 29 20 q )
		( 19 20 w ) (  0 10 d ) ;

beacon:		( 10 10 ) ( 19 10 ) ;

airport:	( 15 15 x ) ;

line:		[ (  1  1 ) (  9  9 ) ]
		[ ( 10  1 ) ( 10  9 ) ]
		[ (  1 10 ) (  9 10 ) ]
		[ ( 11 10 ) ( 18 10 ) ]
		[ ( 15 11 ) ( 15 14 ) ]
		[ ( 20 10 ) ( 28 10 ) ]
		[ ( 19 11 ) ( 19 19 ) ]
		[ ( 20 11 ) ( 28 19 ) ] ;