print("Hello.\n")

fg = 32767

# draw bg, lines
rect(50, 50, 380, 220, 6375)
line(50, 160, 430, 160, fg)
line(240, 50, 240, 270, fg)

x = 50
while (x <= 430) {
	line(x, 170, x, 150, fg)
	x = x + 20
}

y = 50
while (y <= 270) {
	line(230, y, 250, y, fg)
	y = y + 20
}

while (1) {
	x = rand(379) + 50
	y = rand(219) + 50
	i = 50 + rand(379)
	j = 50 + rand(219)

	line(x, y, i, j, 511)

	# for exiting
	getkey()
}