10 OPEN &9,"littlerobot/data"
20 OPEN &9,"littlerobot/command",1
30 S=0
40 WHILE -1
50 GET &2,C
60 SWITCH C
70 CASE "1": PRINT &9,"l"
80 CASE "2": PRINT &9,"r"
90 CASE "3": PRINT &9,"b"
100 CASE "4": PRINT &9,"f"
110 SWEND
120 IF AVAIL(9)=0 THEN CONT
130 INPUT &9,A$: IF A$<>"" THEN CLS: PRINT &2,INT(VAL(A$))
140 WEND