graphsize 31, 31

for i = 1 to 100
    do
	x = int(rand * 30) - 15
	y = int(rand * 30) - 15
	r = sqr(x*x + y*y)
    until 10 <= r and r <= 15
    color rgb(255, 0, 0)
    plot(x+15, y+15)
next i
end