detect motion on mobile using javascript

detectMotion.js

	if (typeof window.DeviceMotionEvent != 'undefined')
	{
	// Shake sensitivity (a lower number is more)
	var sensitivity = 15;

	// Position variables
	var x1 = 0, y1 = 0, z1 = 0, x2 = 0, y2 = 0, z2 = 0;

	// Listen to motion events and update the position
	window.addEventListener('devicemotion', function (e)
	{
	x1 = e.accelerationIncludingGravity.x;
	y1 = e.accelerationIncludingGravity.y;
	z1 = e.accelerationIncludingGravity.z;
	}, false);

	// Periodically check the position and fire
	// if the change is greater than the sensitivity
	setInterval(function ()
	{
	var change = Math.abs(x1-x2+y1-y2+z1-z2);

	if (change > sensitivity)
	{
	// confetti();
	}
	// Update new position
	x2 = x1;
	y2 = y1;
	z2 = z1;
	}, 150);
	}