七彩三角形

"""
   13七彩三角形.py

"""
import turtle
import colorsys

def coloradd(r,g,b):
    """让颜色增加一点点的函数"""
    h,l,s = colorsys.rgb_to_hls(r,g,b)
    h = h + 0.01
    r,g,b = colorsys.hls_to_rgb(h,l,s)
    return r,g,b

c = (1,0,0)
turtle.speed(0)

for i in range(200):
    turtle.color(c)
    turtle.fd(1)
    turtle.sety(turtle.ycor() + i)
    turtle.sety(turtle.ycor() - i)
    c = coloradd(c[0],c[1],c[2])