snake

x = 450
y = 450
radius = 90


class snake:

    def __init__(self):
        global x, y
        self.dickbags_number = 1
        if current_direction == 'left': self.sortament_of_dickbags = [[x+radius], [y]]
        if current_direction == 'right': self.sortament_of_dickbags = [[x-radius], [y]]
        if current_direction == 'up': self.sortament_of_dickbags = [[x], [y-radius]]
        if current_direction == 'up': self.sortament_of_dickbags = [[x], [y+radius]]

    def add(self):
        global s, x, y
        self.dickbags_number += 1
        self.sortament_of_dickbags.append([x - radius
                * self.dickbags_number])
        self.sortament_of_dickbags.append([y - radius
                * self.dickbags_number])

    def current_tail(self):
        return self.sortament_of_dickbags


a = snake()
a.add()
a.add()
a.add()
a.add()
a.add()
print a.current_tail()