diff --git a/01_Day_JavaScript_Refresher/helloworld.js b/01_Day_JavaScript_Refresher/helloworld.js
new file mode 100644
index 0000000..a0b3681
--- /dev/null
+++ b/01_Day_JavaScript_Refresher/helloworld.js
@@ -0,0 +1 @@
+console.log("Hello world!")
\ No newline at end of file
diff --git a/01_Day_JavaScript_Refresher/index.html b/01_Day_JavaScript_Refresher/index.html
new file mode 100644
index 0000000..4b9f0fb
--- /dev/null
+++ b/01_Day_JavaScript_Refresher/index.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta http-equiv="X-UA-Compatible" content="IE=edge">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <script src="introduction.js"></script>
+  <script src="helloworld.js"></script>
+  <title>Document</title>
+</head>
+<body>
+  <button onclick="alert('Welcome to 30 Days of Javascript!')">Click me!</button>
+</body>
+</html>
\ No newline at end of file
diff --git a/01_Day_JavaScript_Refresher/introduction.js b/01_Day_JavaScript_Refresher/introduction.js
new file mode 100644
index 0000000..7a5f112
--- /dev/null
+++ b/01_Day_JavaScript_Refresher/introduction.js
@@ -0,0 +1 @@
+console.log("Welcome")
\ No newline at end of file
