Splits a square defined by its side w into four equal squares defined by their relative coordinates to the top left corner.

split.py

# split a square defined by its side w into four equals
# for Doxin

class Point:
  def __init__(self, x, y): 
    self.x = x
    self.y = y

class Square:
  def __init__(self, x1, y1, x2, y2):
    self.tl = Point(x1, y1)
    self.br = Point(x2, y2)

def splitasquare(w): 
  #  1 2 
  #  3 4 
  square1 = Square(0, 0, w/2,w/2)
  square2 = Square(w/2, 0, w, w/2)
  square3 = Square(0, w/2, w/2, w)
  square4 = Square(w/2, w/2, w, w)