diff --git a/README.md b/README.md
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--- a/README.md
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@@ -1,4 +1,7 @@
 modal-test
 ===============
 
-Trying out ways of doing modal pop-ups on web pages.
\ No newline at end of file
+Trying out ways of doing modal pop-ups on web pages.
+
+Based on code provided by Julia P and https://sabe.io/tutorials/how-to-create-modal-popup-box
+