Jack - for循環

import turtle
changdu=10
jiaodu= 90
turtle.speed(0)
for z in range(1000):
    # turtle.forward(z) # z：0 1 2 3 4 5 6 7。。。
    turtle.circle(z)
    # turtle.right(jiaodu) # z：0 1 2 3 4。。。999
turtle.done()