PAINT (5, 5), 15
sections = 10
xh = 50
yh = 100
WHILE xh < 640 AND INKEY$ = ""
FOR i = 0 TO sections - 1
LINE (xh - 10 * i, yh)-(xh - 10 * i - 10, yh - 10), 6, BF
LINE (xh - 2 - 10 * i, yh - 2)-(xh + 2 - 10 * i - 10, yh - 10 + 2), 4, BF
NEXT i
LINE (xh - 10 * sections, yh)-(xh - 10 * sections - 10, yh - 10), 15, BF
xh = xh + 10
t = TIMER
WHILE t = TIMER
WEND
WEND