from math import pi, cos, sin

import pygame, colorsys

# === graph data ===

# vertices as screen positions
viewsize = 600
shrink = 0.9
vertices = [(viewsize*(1 + shrink*x)/2, viewsize*(1 + shrink*y)/2) for x, y in
  [(0, 0)] + [(cos(-n*pi/5), sin(-n*pi/5)) for n in range(10)] + [(0, 0)]
]

# edges as vertex pairs
edges = [
  (0, 1), (0, 3), (0, 5), (0, 7), (0, 9),
  (2, 8), (2, 6), (6, 10), (10, 4), (4, 8),
  (2, 9), (2, 11), (2, 5),
  (4, 1), (4, 9), (4, 7),
  (6, 3), (6, 11), (6, 9),
  (8, 5), (8, 11), (8, 1),
  (10, 7), (10, 11), (10, 3),
  (9, 3), (9, 5),
  (1, 5), (1, 7),
  (3, 7)
]

# cyclic edge adjacencies
cyc_edge_adj = [
  (0, 1), (1, 2), (2, 3), (3, 4), (4, 0),
  (5, 10), (10, 11), (11, 12), (12, 6), (6, 5),
  (6, 16), (16, 17), (17, 18), (18, 7), (7, 6),
  (7, 22), (22, 23), (23, 24), (24, 8), (8, 7),
  (8, 13), (13, 14), (14, 15), (15, 9), (9, 8),
  (5, 9), (9, 19), (19, 20), (20, 21), (21, 5),
  (4, 10), (10, 25), (25, 26), (26, 18), (18, 4),
  (3, 15), (15, 29), (29, 28), (28, 22), (22, 3),
  (2, 12), (12, 27), (27, 26), (26, 19), (19, 2),
  (1, 24), (24, 25), (25, 29), (29, 16), (16, 1),
  (0, 21), (21, 28), (28, 27), (27, 13), (13, 0),
  (14, 11), (11, 23), (23, 20), (20, 17), (17, 14)
]

# === phase space ===

litness = 30*[0]

# === main loop ===

if __name__ == '__main__':
  # set up display and clock
  pygame.display.init()
  screen = pygame.display.set_mode((viewsize, viewsize))
  pygame.display.set_caption('Preview')
  clock = pygame.time.Clock()
  
  to_light = 0
  while True:
    for event in pygame.event.get():
      if event.type == pygame.QUIT:
        quit()
    
    litness[to_light] = 1.
    for e in range(30):
      pygame.draw.aaline(
        screen,
        tuple(255*c for c in colorsys.hsv_to_rgb(e/30., litness[e], 0.2 + 0.8*litness[e])),
        vertices[edges[e][0]],
        vertices[edges[e][1]],
      )
      litness[e] *= 0.9
    
    # step
    to_light = (to_light + 1) % 30
    pygame.display.flip()
    clock.tick(24)