diff --git a/in/script/main.js b/in/script/main.js
index 66dc068..9077fda 100644
--- a/in/script/main.js
+++ b/in/script/main.js
@@ -6,6 +6,14 @@ link.addEventListener("click", () => {
     document.body.classList.toggle("link");
 });
 
+// swap
+
+const swap = document.getElementById("swap");
+
+link.addEventListener("click", () => {
+    document.body.classList.toggle("swap");
+});
+
 // theme
 
 const button = document.getElementById("theme");