text: import React, { Component } from 'react';
  import logo from './logo.svg';
  import './App.css';
  import Link from './components/Link';
  
  class App extends Component {
    state = {
      pressed: false
    }
  
    buttonClick = () => {
      this.setState({
        pressed: true
      })
    }
    render() {
      const buttonState = this.state.pressed
      return (
        <div className="App">
  
          {buttonState ?
            (<h1>HELLO</h1>) : (null) 
          }
          
          <button onClick={this.buttonClick}>Press Me </button>
  
          <Link />
        </div>
      );
    }
  }
  
  export default App;
  