def shadedsquare(n):
    pts1 = []
    pts2 = []
    pts3 = []
    pts4 = []
    pts5 = []
    pts6 = []
    pts7 = []
    pts8 = []
    pts9 = []
    pts10 = []
    last = (0,0)
    for i in range(n):
        select = randint(0,18)
        (x,y) = last
        if 0 <= select <= 1:
            last = (0.3*x,0.3*y)
            pts1.append(last)
        if 2 <= select <= 3:
            last = (0.3*x + 0.4,0.3*y)
            pts2.append(last)
        if 4 <= select <= 5:
            last = (0.3*x,0.3*y + 0.3)
            pts3.append(last)
        if 6 <= select <= 7:
            last = (0.3*x + 0.4,0.3*y +0.3)
            pts4.append(last)
        if 8 <= select <= 9:
            last = (0.3*x + 0.2, 0.3*y +0.15)
            pts5.append(last)
        if 10 <= select <= 11:
            last = (0.3*x + 0.2, 0.3*y)
            pts6.append(last)
        if 12 <= select <= 13:
            last = (0.3*x, 0.3*y + 0.15)
            pts7.append(last)
        if 13 <= select <= 14:
            last = (0.3*x + 0.2, 0.3*y + 0.3)
            pts8.append(last)
        if 15 <= select <= 16:
            last = (0.3*x + 0.4, 0.3*y + 0.15)
            pts9.append(last)
        if 17 <= select <= 18:
            last = (0.5*x + 0.14, 0.5*y + 0.1)
            pts10.append(last)
    show(points(pts1, color='green') + points(pts2, color='green') + points(pts3, color='green') + points(pts4, color ='green') + points(pts5, color = 'purple') + points(pts6, color ='red') + points(pts7, color = 'blue') + points(pts8, color = 'red') + points(pts9, color = 'blue') + points(pts10, color = 'yellow'),aspect_ratio=1)


shadedsquare(5000)