SLEEP 1 is crashing the program

Anyone experiences this ?

Inserting SLEEP 1 into a LOOP, like here :


'initializing:

rotate$ = MID$("|/-\|/-", (a% + 1), 1)
cnt% = 1

DO UNTIL EOF(1) = -1 OR cnt% = 200
LINE INPUT #1, linebuf$
linebuf$ = RTRIM$(linebuf$)

IF LEN(linebuf$) > 0 AND LEN(linebuf$) <= 200 THEN
stat(cnt%).lines = LEN(linebuf$)
stat(LEN(linebuf$)).count = stat(LEN(linebuf$)).count + 1
cnt% = cnt% + 1

IF (cnt% MOD 10) = 0 THEN
'rotation bar

LOCATE 1, 80
PRINT rotate$;
SLEEP 1
END IF
END IF

LOOP