def drawTriangle(win, p1, p2, p3, colour):
   triangle = Polygon(p1, p2, p3)
   triangle.setFill(colour)
   triangle.draw(win)

def innerPatchDesign(x1, y1, x2, y2, colour):
   win = GraphWin("Inner Patch Design", 100, 100)
   rectangle = Rectangle(Point(x1, y1), Point(x2, y2))
   rectangle.draw(win)
   height = 20
   width = 20
   for row in range(5):
       for x in range(5):
           drawTriangle(win,
               Point(x * width, row * height),
               Point((x + 1) * width, row * height),
               Point((x + 1) * width / 2, (row + 1) * height),
               colour)