diff --git a/scroll-func.js b/scroll-func.js
new file mode 100644
index 0000000000..e027428707
--- /dev/null
+++ b/scroll-func.js
@@ -0,0 +1,7 @@
+let scrollBtn = document.querySelector(".back-to-top");
+window.addEventListener("scroll", function(){
+      let position = window.scrollY;
+    if(position < 200){
+      scrollBtn.style.opacity = "0";
+    }else{scrollBtn.style.opacity = "1";}
+})