import pygame
import math
import sys

# Initialize Pygame
pygame.init()

# Constants
WIDTH, HEIGHT = 800, 600
FPS = 60

# Set up the display
screen = pygame.display.set_mode((WIDTH, HEIGHT), pygame.FULLSCREEN)
pygame.display.set_caption("Rotating Illusion")

def draw_rotating_pattern(angle):
    # Fill the screen with white
    screen.fill((255, 255, 255))

    # Draw a rotating pattern
    for i in range(50):
        for j in range(50):
            # Calculate position to cover the screen
            x = (i * (WIDTH // 50))  # Adjust size to fit screen
            y = (j * (HEIGHT // 50))  # Adjust size to fit screen
            # Calculate rotation
            offset_x = int(30 * math.cos(angle + (i + j) * 0.1))
            offset_y = int(30 * math.sin(angle + (i + j) * 0.1))  # Added missing parenthesis here
            color = (0, 0, 0) if (i + j) % 2 == 0 else (255, 255, 255)
            pygame.draw.rect(screen, color, (x + offset_x, y + offset_y, (WIDTH // 50), (HEIGHT // 50)))

    # Draw a red dot in the center
    pygame.draw.circle(screen, (255, 0, 0), (WIDTH // 2, HEIGHT // 2), 10)

def main():
    clock = pygame.time.Clock()
    angle = 0

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

        draw_rotating_pattern(angle)
        pygame.display.flip()
        
        angle += 0.05  # Increase the angle for rotation
        clock.tick(FPS)

if __name__ == "__main__":
    main()