<!DOCTYPE html>
<html lang="en-US">
<head>
<script src="https://www.gstatic.com/charts/loader.js"></script>
</head>
<body>
<div id="point">
</div>
<script>
google.charts.load('current', {'packages':['gauge']});
google.charts.setOnLoadCallback(drawChart);
function drawChart() {
var data = google.visualization.arrayToDataTable([
['Label', 'Value'],
['Memory', 80],
['CPU', 70]
]);
var options = {
width: 400,
height: 400,
redFrom: 90, redTo: 100,
yellowFrom:75, yellowTo: 90,
minorTicks: 5
};
var chart = new google.visualization.Gauge(document.getElementById('point'));
chart.draw(data, options);
setInterval(function() {
data.setValue(0, 1, 40 + Math.round(60 * Math.random()));
chart.draw(data, options);
}, 2000);
setInterval(function() {
data.setValue(1, 1, 40 + Math.round(60 * Math.random()));
chart.draw(data, options);
}, 5000);
}
</script> </body>
</html>