title: Watermark GIF with Python PIL
body: <p>I'm trying to find a way to watermark a gif image, below is my code:</p>
  
  <pre><code>img = Image.open("my.gif")
  watermark = Image.open("watermark.gif")
  
  img.paste(watermark, (1, 1))
  img.save("out.gif")
  </code></pre>
  
  <p>File: my.gif:</p>
  
  <p><img src="https://i.stack.imgur.com/5vCFj.gif" alt="my.gif"></p>
  
  <p>File: watermark.gif:</p>
  
  <p><img src="https://i.stack.imgur.com/Zio4y.gif" alt="Watermark Gif"></p>
  
  <p>the output "out.gif" is no longer animated, it shows one frame with the watermark:
  <img src="https://i.stack.imgur.com/MpNrI.gif" alt="Out.gif"></p>
  
  <p>I know that PIL supports the GIF format, so I must be doing something wrong. All help is appreciated.</p>