text: import React from 'react';
  import AppNavbar from './AppNavbar';
  import BlockView from './BlockView';
  import Arrow from './Arrow';
  import { Container } from '@material-ui/core';
  
  const App = () => {
      return(
          <Container>
            <AppNavbar>
                <BlockView />
                <Arrow />
            </AppNavbar>
          </Container>
      );
  };
  
  export default App;