Python design Fast Tutorial 1

 Source Code:

from turtle import*

import colorsys

speed(0)

fd(100)

he = 0.7  

bgcolor("black")

for i in range(200):  

    col = colorsys.hsv_to_rgb(he,1,1)

    he+=0.004

    fillcolor(col)

    def triangle(a,b,c):

        lt(120)

        fd(a-i)

        lt(120)

        fd(b-i)

        lt(90)

        fd(c-i)

    begin_fill()

    triangle(200,200,200)

    left(90)

    left(20)

    left(90)

    triangle(200,200,200)

    right(120)

    end_fill()

    hideturtle()

done()