Added new contribution (#1940)

Co-authored-by: Greg Kreisman <gkreisman@gmail.com>

Author: ch00ooch00oo

content/videos/pixels/checkbox-mirror/showcase/contribution-1768184968.json

@@ -0,0 +1,11 @@
+{
+  "title": "Textbox Mirror",
+  "author": {
+    "name": "Greg Kreisman",
+    "url": "https://greggelong.github.io/",
+    "instagram": "https://www.instagram.com/gregkreisman/"
+  },
+  "url": "https://editor.p5js.org/greggelong/sketches/hjUrb5-C_",
+  "submittedOn": "2026-01-12T02:29:28.965Z",
+  "socialPermission": true
+}