<label for="fuel">Fuel level:</label>
<meter id="fuel" min="0" max="100" low="33" high="66" optimum="80" value="40">at 40/100</meter>
<meter id="fuel" min="0" max="100" low="33" high="66" optimum="80" value="20">at 20/100</meter>
<meter id="fuel" min="0" max="100" low="33" high="66" optimum="80" value="70">at 70/100</meter>