We'll use acceleration
and
accelerationIncludingGravity
give the
acceleration of the device on the three axis X, Y and Z. Acceleration is expressed in m/s2.
window.addEventListener('devicemotion', function(event) {
const x = event.accelerationIncludingGravity.x;
const y = event.accelerationIncludingGravity.y;
const z = event.accelerationIncludingGravity.z;
...
});