diff --git a/README.md b/README.md
index e913c2f..d2aa385 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,3 @@
 See https://alo.land/a-photo-is-easier-than-a-thousand-words/
+
+Based on code from https://gist.github.com/clowestab/e1b9010deef2875cb4e33005f1a01c75