100 PRINT "CHOOSE A KEY: Yes, No, Maybe, END"
110 CALL KEY(3,K,S)
120 IF K=89 THEN PRINT "YES" :: GOTO 110
130 IF K=78 THEN PRINT "NO" :: GOTO 110
140 IF K=77 THEN PRINT "MAYBE" :: GOTO 110
150 IF K=69 THEN PRINT "END" :: END
160 GOTO 110


