import turtle

def drawTriangle(points,color,myTurtle):
    myTurtle.fillcolor(color)
    myTurtle.up()
    myTurtle.goto(points[0][0],points[0][1])
    myTurtle.down()
    myTurtle.begin_fill()
    myTurtle.goto(points[1][0],points[1][1])
    myTurtle.goto(points[2][0],points[2][1])
    myTurtle.goto(points[0][0],points[0][1])
    myTurtle.end_fill()

def getMid(p1,p2):
    return ( (p1[0]+p2[0]) / 2, (p1[1] + p2[1]) / 2)

def sierpinski(points,degree,myTurtle):
    colormap = ['blue','red','green','white','yellow','violet','orange']
    drawTriangle(points,colormap[degree],myTurtle)

    if degree > 0:
        sierpinski([points[0], getMid(points[0], points[1]), getMid(points[0], points[2])], degree-1, myTurtle)
        sierpinski([points[1], getMid(points[0], points[1]), getMid(points[1], points[2])], degree-1, myTurtle)
        sierpinski([points[2], getMid(points[2], points[1]), getMid(points[0], points[2])], degree-1, myTurtle)

def main():
    myTurtle = turtle.Turtle()
    myWin = turtle.Screen()
    myPoints = [[-100,-50],[0,100],[100,-50]]
    sierpinski(myPoints,3,myTurtle)
    myWin.exitonclick()
main()

# Continue from PG100, Turtle Maze