ESPTrainer/imports/ui/Score.jsx

import React, { PropTypes } from 'react';
import './styles/Score';

const Score = ({ score }) =>
	<div className="score">
		<div className="scale">
			{
				[...Array(25).keys()].map(x => <div key={x} className="grade" style={{left: (x * 20) + 'px'}} />)
			}
		</div>
		<div className="current-score" style={{ width: (score * 20) + 'px' }} />
	</div>;

Score.propTypes = { score: PropTypes.number.isRequired };

export default Score;