Restructure folder and completed 1.6

part1/1.6-1.11-unicafe/src/App.js

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+import React, { useState } from 'react'
+
+const App = () => {
+  // save clicks of each button to its own state
+  const [good, setGood] = useState(0)
+  const [neutral, setNeutral] = useState(0)
+  const [bad, setBad] = useState(0)
+
+  return (
+    <div>
+      <h1>Give feedback</h1>
+      <button onClick={() => setGood(good + 1)}>good</button>
+      <button onClick={() => setNeutral(neutral + 1)}>neutral</button>
+      <button onClick={() => setBad(bad + 1)}>bad</button>
+      <h1>Statistic</h1>
+      <p>Good: {good}</p>
+      <p>Neutral: {neutral}</p>
+      <p>Bad: {bad}</p>
+    </div>
+  )
+}
+
+export default App

part1/1.6-1.11-unicafe/src/index.css

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+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
+    monospace;
+}

part1/1.6-1.11-unicafe/src/index.js

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+import ReactDOM from 'react-dom'
+import App from './App'
+
+ReactDOM.render(
+  <App />, 
+  document.getElementById('root')
+)