| 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 | |