from graphics import *
from time import *
def midP(p,q):
    xVal = (p.getX()+q.getX())/2.0
    yVal = (p.getY()+q.getY())/2.0
    mid = Point(xVal,yVal)
    return mid

def main():
    win = GraphWin("my window",400,400)
    colors = [ "red", "orange", "yellow", "green"]

    p1 = Point(10,10)
    p2 = Point(200,200)
    p3 = Point(10,200)
    triangle = Polygon(p1,p2,p3)
    triangle.setFill(colors[0])
    triangle.draw(win)
    
    for i in range(1,len(colors) ):
        sleep(1)
        m1 = midP(p1,p2)
        m2 = midP(p2,p3)
        m3 = midP(p3,p1)
        triangle = Polygon(m1,m2,m3)
        triangle.setFill(colors[i])
        triangle.draw(win)
        p1 = m1
        p2 = m2
        p3 = m3
       
            
    
main()