diff --git a/src/App.css b/src/App.css
new file mode 100644
index 0000000..12da395
--- /dev/null
+++ b/src/App.css
@@ -0,0 +1,22 @@
+body {
+  display: flex;
+  justify-content: center;   
+  height: 100vh;            
+  margin: 0;              
+}
+
+.square-container {
+  display: flex;           
+  justify-content: center;   
+  gap: 10px;               
+  margin-bottom: 20px;      
+}
+
+.square {
+  width: 50px;          
+  height: 50px;          
+  color: white;         
+  display: flex;            
+  align-items: center;     
+  justify-content: center; 
+}
diff --git a/src/App.jsx b/src/App.jsx
new file mode 100644
index 0000000..2f0ca20
--- /dev/null
+++ b/src/App.jsx
@@ -0,0 +1,12 @@
+import React from 'react';
+import SquareSet from './SquareSet';
+
+function App() {
+  return (
+    <div className="App">
+      <SquareSet />
+    </div>
+  );
+}
+
+export default App;
diff --git a/src/SquareSet.jsx b/src/SquareSet.jsx
new file mode 100644
index 0000000..eba3599
--- /dev/null
+++ b/src/SquareSet.jsx
@@ -0,0 +1,33 @@
+import React, { useState } from 'react';
+import './App.css';
+
+const SquareSet = () => {
+  const [activeIndex, setActiveIndex] = useState(0);
+
+  const squares = Array.from({ length: 5 }); // Create an array for 5 squares
+
+  const handleToggle = () => {
+    setActiveIndex((prevIndex) => (prevIndex + 1) % squares.length);
+  };
+
+  return (
+    <div>
+      <div className="square-container">
+        {squares.map((_, index) => (
+          <div
+            key={index}
+            className="square"
+            style={{
+              backgroundColor: index === activeIndex ? 'red' : 'black',
+            }}
+          >
+            Square {index + 1}
+          </div>
+        ))}
+      </div>
+      <button onClick={handleToggle}>Next Square</button>
+    </div>
+  );
+};
+
+export default SquareSet;
diff --git a/src/index.css b/src/index.css
index 4efa42a..6119ad9 100644
--- a/src/index.css
+++ b/src/index.css
@@ -1,25 +1,68 @@
+:root {
+  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+
+  color-scheme: light dark;
+  color: rgba(255, 255, 255, 0.87);
+  background-color: #242424;
+
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+a {
+  font-weight: 500;
+  color: #646cff;
+  text-decoration: inherit;
+}
+a:hover {
+  color: #535bf2;
+}
+
 body {
   margin: 0;
-  padding: 0;
-  font-family: sans-serif;
+  display: flex;
+  place-items: center;
+  min-width: 320px;
+  min-height: 100vh;
 }
 
-.boards {
-  margin: 20px 0;
-  overflow: hidden;
+h1 {
+  font-size: 3.2em;
+  line-height: 1.1;
 }
 
-.board {
-  border: 5px solid #ccc;
-  float: left;
-  font:
-    700 24px HelveticaNeue,
-    Helvetica,
-    Arial;
-  margin-right: 20px;
-  padding: 20px;
+button {
+  border-radius: 8px;
+  border: 1px solid transparent;
+  padding: 0.6em 1.2em;
+  font-size: 1em;
+  font-weight: 500;
+  font-family: inherit;
+  background-color: #1a1a1a;
+  cursor: pointer;
+  transition: border-color 0.25s;
+}
+button:hover {
+  border-color: #646cff;
+}
+button:focus,
+button:focus-visible {
+  outline: 4px auto -webkit-focus-ring-color;
 }
 
-.board.selected {
-  border-color: #3ba8aa;
+@media (prefers-color-scheme: light) {
+  :root {
+    color: #213547;
+    background-color: #ffffff;
+  }
+  a:hover {
+    color: #747bff;
+  }
+  button {
+    background-color: #f9f9f9;
+  }
 }
diff --git a/src/main.jsx b/src/main.jsx
index 782f402..89f91e5 100644
--- a/src/main.jsx
+++ b/src/main.jsx
@@ -1,11 +1,10 @@
-import React from "react";
-import ReactDOM from "react-dom/client";
-import BoardSwitcher from "./components/BoardSwitcher";
-import "./index.css";
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import App from './App.jsx'
+import './index.css'
 
-const root = ReactDOM.createRoot(document.getElementById("root"));
-root.render(
-  <React.StrictMode>
-    <BoardSwitcher numBoards={3} />
-  </React.StrictMode>
-);
+createRoot(document.getElementById('root')).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+)