Added new contribution

Author: jnafolayan

content/videos/challenges/180-falling-sand/showcase/contribution-1706810742.jpg

@@ -0,0 +1,9 @@
+{
+  "title": "Sandfall",
+  "author": {
+    "name": "John Afolayan",
+    "twitter": "jnafolayan"
+  },
+  "url": "https://github.com/jnafolayan/sandfall",
+  "submittedOn": "2024-02-01T18:05:42.720Z"
+}