content: import React from 'react';
  import Box from '@material-ui/core/Box';
  
  function Block() {
    return (
      <div style={{ width: '100%' }}>
        <Box component="span" display="block" p={1} m={1} bgcolor="background.paper">
          block
        </Box>
        <Box component="span" display="block" p={1} m={1} bgcolor="background.paper">
          block
        </Box>
      </div>
    );
  }
  
  export default Block;
  