title: HTML + CANVAS: Constellation background animation
body: <p>I've been wanting to implement a moving constellation background for a site of mine.</p>
  
  <p>This is an example of the effect I'd like to achieve:</p>
  
  <p><a href="https://i.stack.imgur.com/7Gsni.png" rel="noreferrer"><img src="https://i.stack.imgur.com/7Gsni.png" alt="enter image description here"></a></p>
  
  <p>The image doesn't show, but those constellations are constantly moving. I took that from the: <a href="https://www.nuclino.com/" rel="noreferrer">https://www.nuclino.com/</a> site, which is awesome BTW.</p>
  
  <p>So here my questions:</p>
  
  <ul>
  <li>How could I use a CSS animation/transition to implement this effect? CSS transitions only let me specify positions at every step of the animation.</li>
  <li>Is there any JS library for this effect?</li>
  </ul>