记得引入jq

<script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>

! function () {
	function n(n, e, t) {
		return n.getAttribute(e) || t
	}
	function e(n) {
		return document.getElementsByTagName(n)
	}
	function t() {
		var t = e("script"),
			o = t.length,
			i = t[o - 1];
		return {
			l: o,
			z: n(i, "zIndex", -1),
			o: n(i, "opacity", .5),
			c: n(i, "color", "255,97,6"),
			n: n(i, "count", 99)
		}
	}
	function o() {
		a = m.width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth,
			c = m.height = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight
	}
	function i() {
		r.clearRect(0, 0, a, c);
		var n, e, t, o, m, l;
		s.forEach(function (i, x) {
				for (i.x += i.xa, i.y += i.ya, i.xa *= i.x > a || i.x < 0 ? -1 : 1, i.ya *= i.y > c || i.y < 0 ? -1 : 1, r.fillRect(i.x - .5, i.y - .5, 1, 1), e = x + 1; e < u.length; e++) n = u[e],
					null !== n.x && null !== n.y && (o = i.x - n.x, m = i.y - n.y,
						l = o * o + m * m, l < n.max && (n === y && l >= n.max / 2 && (i.x -= .03 * o, i.y -= .03 * m),
							t = (n.max - l) / n.max, r.beginPath(), r.lineWidth = t / 2, r.strokeStyle = "rgba(" + d.c + "," + (t + .2) + ")", r.moveTo(i.x, i.y), r.lineTo(n.x, n.y), r.stroke()))
			}),
			x(i)
	}
	var a, c, u, m = document.createElement("canvas"),
		d = t(),
		l = "c_n" + d.l,
		r = m.getContext("2d"),
		x = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame ||
		function (n) {
			window.setTimeout(n, 1e3 / 45)
		},
		w = Math.random,
		y = {
			x: null,
			y: null,
			max: 2e4
		};
	m.id = l, m.style.cssText = "position:fixed;top:0;left:0;z-index:" + d.z + ";opacity:" + d.o, e("body")[0].appendChild(m), o(), window.onresize = o,
		window.onmousemove = function (n) {
			n = n || window.event, y.x = n.clientX, y.y = n.clientY
		},
		window.onmouseout = function () {
			y.x = null, y.y = null
		};
	for (var s = [], f = 0; d.n > f; f++) {
		var h = w() * a,
			g = w() * c,
			v = 2 * w() - 1,
			p = 2 * w() - 1;
		s.push({
			x: h,
			y: g,
			xa: v,
			ya: p,
			max: 6e3
		})
	}
	u = s.concat([y]),
		setTimeout(function () {
			i()
		}, 100)
}();