DECLARE SUB d (p!, s!, x!, y!)
DIM t(80)
FOR i = 1 TO 80
    t(i) = INT(-50 * RND)
NEXT
s = TIMER

CLS
WHILE 1
    FOR i = 1 TO 80
        IF t(i) > 28 THEN t(i) = 0
        t(i) = t(i) + 1
        y = t(i)
        d 0, 0, i, y - 6
        d 2, 0, i, y - 5
        d 2, 0, i, y - 4
        d 10, 0, i, y - 3
        d 10, 0, i, y - 2
        d 11, 0, i, y - 1
        d 0, 2, i, y
    NEXT

    l = TIMER
    WHILE l = TIMER
    WEND
WEND

SUB d (p, s, x, y)
    COLOR p, s
    IF y > 0 AND y < 24 THEN LOCATE y, x: PRINT CHR$(33 + (x * y) MOD 200);
END SUB