10 *FX119 20 IF G%=23 AND J%=24 THEN CHAIN"!MAG" 30 MODE0:VDU23;8202;0;0;0;:*LOAD !SCREEN FFFF3000 40 OSCLI"FX21":REPEAT UNTIL GET:CLS:G%=23:J%=24:CHAIN"!MAG"