diff --git a/script.js b/script.js
index 5fdf7bf..625cfcb 100644
--- a/script.js
+++ b/script.js
@@ -1 +1,35 @@
-console.log
+let darkmode = false ;
+const BUTTON= Document.getElementbyId ('Switch ');
+const Body = document.querySelector ('body') ;
+
+
+if (window.matchMedia('(prefers-scheme:dark )').matches ) {
+darkmode= true ;
+} else{
+    darkmode= false;
+}
+
+console.log(darkmode);
+
+const switchMode = () => {
+    darkmode = !darkmode;
+    setclassTobody();
+
+}
+
+const setclassTobody =() => {
+if (darkmode){
+   Body.classList.remove('light');
+   Body.classList.add('dark');
+   
+}else{
+ Body.classList.add('light');
+   Body.classList.remove('dark');
+
+}
+
+} ;
+
+BUTTON.addEventLister('click', switchMode );
+setclassTobody;
+