Simple PyGame Animation for Mikas

pgmikas.py

import random
import pygame
import sys
import math

FPS = 80
WINDOW_WIDTH = 800
WINDOW_HEIGHT = 600
NRECTS = 16
RECT_SIZE = 64


def clamp(n, smallest, largest):
    return max(smallest, min(n, largest))


pygame.init()

size = width, height = 800, 600
black = 0, 0, 0
frame = 0
r = 128
g = 128
b = 128

flags = pygame.DOUBLEBUF | pygame.SCALED
screen = pygame.display.set_mode(size, flags, vsync=1)

clk = pygame.time.Clock()
while True:
    clk.tick(60)
    frame += 1

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()

    screen.fill(black)

    # draw NRECTS rectangles
    for i in range(NRECTS, 1, -1):
        x = (WINDOW_WIDTH / 2 - 50) * math.sin(1.0 * 3.14 * (frame - i * 4) / FPS) + (WINDOW_WIDTH - RECT_SIZE) / 2
        y = (WINDOW_HEIGHT / 2 - 50) * math.cos(1.2 * 3.14 * (frame - i * 4) / FPS) + (WINDOW_HEIGHT - RECT_SIZE) / 2
        # Initialing Color
        color = (clamp(r - 10 * i, 0, 255),
                 clamp(g - 10 * i, 0, 255),
                 clamp(b - 10 * i, 0, 255))

        # Drawing Rectangle
        pygame.draw.rect(pygame.display.get_surface(), color, pygame.Rect(x, y, RECT_SIZE, RECT_SIZE))

    r = clamp(r + random.randint(-1, 1), 0, 255)
    g = clamp(g + random.randint(-1, 1), 0, 255)
    b = clamp(b + random.randint(-1, 1), 0, 255)

    pygame.display.flip()