Draws a pretty block using pygame's draw functions. Written up for this tutorial: http://superbase.tumblr.com/post/43037844981/presenting-pretty-blocks-programmatically-in-python

drawblock.py

import pygame
import sys

def lightened(colour, amount):
  newcolour = pygame.Color(colour.r, colour.g, colour.b, colour.a)
  h, s, l, a = newcolour.hsla
  if l+amount > 100: l = 100
  elif l+amount < 0: l = 0
  else: l += amount
  newcolour.hsla = (h, s, l, a)
  return newcolour

def draw_block(surface, x, y, size, colour):
  base_rect = pygame.Rect(x, y, size, size)
  inner_rect = pygame.Rect(y+(size*3.0/10)/2, y+(size*3.0/10)/2, size*7/10, size*7/10)
  top_triangle = [(base_rect.topleft[0], base_rect.topleft[1]-1), 
                  (base_rect.topright[0]-1, base_rect.topright[1]-1), 
			            base_rect.center]
  bottom_triangle = [(base_rect.bottomleft[0], base_rect.bottomleft[1]-1), 
  				           (base_rect.bottomright[0]-1, base_rect.bottomright[1]-1), 
  				           base_rect.center]
  pygame.draw.rect(surface, colour, base_rect)    
  pygame.draw.polygon(surface, lightened(colour, 10), top_triangle)
  pygame.draw.polygon(surface, lightened(colour, -10), bottom_triangle)
  pygame.draw.rect(surface, lightened(colour, 5), inner_rect)

pygame.init()
screen = pygame.display.set_mode((320, 320))

screen.fill(0x363743)
draw_block(screen, 50, 50, 200, pygame.Color(0x88C10000))
pygame.display.update()

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