new python turtle graphics codes

import turtle as t
import colorsys as c
t.tracer(20)
t.bgcolor('black')
t.setup(1537,865)
o=0.0
for i in range(2000):
    o+=0.01
    color=c.hsv_to_rgb(o,1,1)
    t.begin_fill()
    t.fillcolor(color)
    t.fd(i)
    t.rt(200)
    t.circle(i,90)
    t.fd(i)
    t.rt(300)
    t.fd(i)
    t.rt(200)
    t.setpos(0,0)
    t.end_fill()
t.done()