title: How to draw a transparent image in pygame?
body: <p>Consider a chess board, i have a transparent image of queen(queen.png) of size 70x70 and i want to display it over a black rectangle.
  Code:</p>
  
  <pre><code>BLACK=(0,0,0)
  queen = pygame.image.load('queen.png')
  
  pygame.draw.rect(DISPLAYSURF, BLACK, (10, 10, 70, 70))
  DISPLAYSURF.blit(queen, (10, 10))
  </code></pre>
  
  <p>Error: i am not getting transparent image ie black rectangle is not visible at all, only queen with white background.
  Please suggest</p>