100 ! RXB CALL ONKEY
110 PRINT "CHOOSE A KEY: Yes, No, Maybe, END"
120 CALL ONKEY("YNME",3,K,S)GOTO 140,150,160,170
130 GOTO 120
140 PRINT "YES!" :: GOTO 120
150 PRINT "NO!" :: GOTO 120
160 PRINT "MAYBE!" :: GOTO 120
170 PRINT "END!"