content: import React from 'react';
  import PropTypes from 'prop-types';
  import Paper from '@material-ui/core/Paper';
  import { withStyles } from '@material-ui/core/styles';
  import Grid from '@material-ui/core/Grid';
  
  const styles = theme => ({
    root: {
      width: 400,
      backgroundColor: theme.palette.secondary.main,
    },
    paper: {
      padding: 16,
      textAlign: 'center',
    },
  });
  
  function StressGrid(props) {
    const { classes } = props;
  
    return (
      <div className={classes.root}>
        <Grid container spacing={24} direction="column">
          <Grid container item spacing={8}>
            <Grid item xs={3}>
              <Paper className={classes.paper}>xs=3</Paper>
            </Grid>
            <Grid item xs={9}>
              <Paper className={classes.paper}>xs=9</Paper>
            </Grid>
          </Grid>
          <Grid container item spacing={8} direction="row-reverse">
            <Grid item xs={3}>
              <Paper className={classes.paper}>first</Paper>
            </Grid>
            <Grid item xs={3}>
              <Paper className={classes.paper}>last</Paper>
            </Grid>
          </Grid>
          <Grid container item spacing={8} justify="space-between">
            <Grid item xs={3}>
              <Paper className={classes.paper}>space</Paper>
            </Grid>
            <Grid item xs={3}>
              <Paper className={classes.paper}>between</Paper>
            </Grid>
          </Grid>
          <Grid container item spacing={8} alignItems="stretch" direction="column-reverse">
            <Grid item>
              <Paper className={classes.paper}>reverse</Paper>
            </Grid>
            <Grid item>
              <Paper className={classes.paper}>column</Paper>
            </Grid>
          </Grid>
        </Grid>
      </div>
    );
  }
  
  StressGrid.propTypes = {
    classes: PropTypes.object.isRequired,
  };
  
  export default withStyles(styles)(StressGrid);
  