A script which make a spinning circle

spinningcircle.py

import math
import pygame

from pygame.locals import *


class SpinningCircle(pygame.surface.Surface):

    '''
    Class which make a spinning circle

    Usage:
    >>> cirlce = SpinningCircle(100, (255, 0, 0))
    >>> circle.update()
    '''

    def __init__(self, radius, color, speed=0.5):

        self.color = color
        self.radius = radius
        self.angle = 0
        self.speed = speed
        self.thickness = int(self.radius / 25.)
        self.portion = 360
        self.update()

    def update(self):

        super(SpinningCircle, self).__init__((self.radius * 2, self.radius * 2), SRCALPHA)

        for i in range(self.portion):

            angle = math.radians(self.angle + i)
            pygame.draw.circle(self, [min(max(x * float(i) / self.radius, 0), 255) for x in self.color], (int(math.sin(angle) * (self.radius - self.thickness) + self.radius), int(math.cos(angle) * (self.radius - self.thickness) + self.radius)), self.thickness)

        self.angle += self.speed