diff --git a/examples/react-concepts/src/App.css b/examples/react-concepts/src/App.css
index 74b5e05..e550032 100644
--- a/examples/react-concepts/src/App.css
+++ b/examples/react-concepts/src/App.css
@@ -1,38 +1,5 @@
 .App {
-  text-align: center;
-}
-
-.App-logo {
-  height: 40vmin;
-  pointer-events: none;
-}
-
-@media (prefers-reduced-motion: no-preference) {
-  .App-logo {
-    animation: App-logo-spin infinite 20s linear;
-  }
-}
-
-.App-header {
-  background-color: #282c34;
+  background-color: bisque;
   min-height: 100vh;
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  justify-content: center;
-  font-size: calc(10px + 2vmin);
-  color: white;
-}
-
-.App-link {
-  color: #61dafb;
-}
-
-@keyframes App-logo-spin {
-  from {
-    transform: rotate(0deg);
-  }
-  to {
-    transform: rotate(360deg);
-  }
+  font-size: 1.5rem;
 }
diff --git a/examples/react-concepts/src/App.js b/examples/react-concepts/src/App.js
index 3784575..586cc28 100644
--- a/examples/react-concepts/src/App.js
+++ b/examples/react-concepts/src/App.js
@@ -1,23 +1,24 @@
-import logo from './logo.svg';
-import './App.css';
+import React, { useState } from "react";
+import Input from "./components/class/Input";
+import "./App.css";
 
 function App() {
+  const [state, setState] = useState("default");
+
+
+
   return (
-    <div className="App">
-      <header className="App-header">
-        <img src={logo} className="App-logo" alt="logo" />
-        <p>
-          Edit <code>src/App.js</code> and save to reload.
-        </p>
-        <a
-          className="App-link"
-          href="https://reactjs.org"
-          target="_blank"
-          rel="noopener noreferrer"
-        >
-          Learn React
-        </a>
-      </header>
+    <div
+      className="App"
+      style={{
+        color: "red",
+        textAlign: "center",
+      }}
+    >
+      
+
+      <Input />
+      <h1>{state}</h1>
     </div>
   );
 }
diff --git a/examples/react-concepts/src/components/class/Input.jsx b/examples/react-concepts/src/components/class/Input.jsx
new file mode 100644
index 0000000..7993700
--- /dev/null
+++ b/examples/react-concepts/src/components/class/Input.jsx
@@ -0,0 +1,18 @@
+import React, { Component } from "react";
+
+class Input extends Component {
+  constructor() {}
+  //state = "default";
+
+  /*function handleChange(event) {
+    console.log(event.target.value);
+    //setState(event.target.value);
+    //console.log("state", state);
+  }*/
+
+  render() {
+    return <input value={this.state} type="text" onChange={handleChange} />;
+  }
+}
+
+export default Input;
diff --git a/examples/react-concepts/src/index.js b/examples/react-concepts/src/index.js
index d563c0f..770ee7d 100644
--- a/examples/react-concepts/src/index.js
+++ b/examples/react-concepts/src/index.js
@@ -1,10 +1,10 @@
-import React from 'react';
-import ReactDOM from 'react-dom/client';
-import './index.css';
-import App from './App';
-import reportWebVitals from './reportWebVitals';
+import React from "react";
+import ReactDOM from "react-dom/client";
+import "./index.css";
+import App from "./App";
+import reportWebVitals from "./reportWebVitals";
 
-const root = ReactDOM.createRoot(document.getElementById('root'));
+const root = ReactDOM.createRoot(document.getElementById("root"));
 root.render(
   <React.StrictMode>
     <App />