10 A$=INKEY$
20 IF A$="1" THEN PLAY"a"
30 IF A$="2" THEN PLAY"b"
40 IF A$="3" THEN PLAY"c"
50 IF A$="4" THEN PLAY"d"
60 IF A$="5" THEN PLAY"e"
70 IF A$="6" THEN PLAY"f"
80 IF A$="7" THEN PLAY"g"
90 GOTO 10