叠加等边三角形

import turtle
turtle.setup(650,350,200,200)
turtle.penup()
turtle.pensize(1)
turtle.pencolor("red")
turtle.fillcolor("purple")
turtle.begin_fill()
turtle.seth(60)
turtle.pendown()
turtle.fd(50)
turtle.seth(-60)
turtle.fd(100)
turtle.seth(-180)
turtle.fd(100)
turtle.seth(60)
turtle.fd(50)
turtle.seth(0)
turtle.fd(50)
turtle.seth(-120)
turtle.fd(50)
turtle.seth(120)
turtle.fd(50)
turtle.end_fill()