add beach link to notes

Author: stevekrouse

episodes/20.md

@@ -14,6 +14,7 @@ Jason Brennan is a Canadian computer scientist focused on education and computin
 
 ## Episode Notes
 
+* [Beach](http://nearthespeedoflight.com/beach/)
 * [Hopscotch & Learnable Programming](http://gethopscotch.tumblr.com/post/32807560089/learnableprogramming) 
 * [Alan Kay / OLPC TED talk](https://www.youtube.com/watch?v=Eg_ToU7m1MI)
 * [Jason's Playgrounds talk](https://www.skilled.io/u/playgroundscon/playgrounds) and [some thoughts after the talk](http://nearthespeedoflight.com/article/2017_03_04_about_my_playgrounds_talk)
@@ -29,4 +30,4 @@ m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
 })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
 ga('create', 'UA-103157758-1', 'auto');
 ga('send', 'pageview');
-</script>
+</script>