diff --git a/README.md b/README.md
index 3afd5a4..5ddc686 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,3 @@
-put script.js into any userscript extension, like [Tampermonkey](https://www.tampermonkey.net/) or [Violentmonkey](https://violentmonkey.github.io/)
\ No newline at end of file
+put script.js into any userscript extension, like [Tampermonkey](https://www.tampermonkey.net/) or [Violentmonkey](https://violentmonkey.github.io/)
+
+delay is optional, but not recommended to remove
\ No newline at end of file