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预览页面的传送门：
LY-jilei
代码都在html里，(右键查看源代码即可得到啦)
这篇文章会有点水，哈哈哈哈~睡觉
想想还是贴个代码吧
js
document.addEventListener('touchmove', function (e) {
e.preventDefault()
})
var c = document.getElementsByTagName('canvas')[0],
x = c.getContext('2d'),
pr = window.devicePixelRatio || 1,
w = window.innerWidth,
h = window.innerHeight,
f = 90,
q,
m = Math,
r = 0,
u = m.PI*2,
v = m.cos,
z = m.random
c.width = w*pr
c.height = h*pr
x.scale(pr, pr)
x.globalAlpha = 0.6
function i(){
x.clearRect(0,0,w,h)
q=[{x:0,y:h*.7+f},{x:0,y:h*.7-f}]
while(q[1].xh||t<0) ? y(p) : t
}
document.onclick = i
document.ontouchstart = i
i()
css
canvas {
position: absolute;
top: 0;
left: 0;
z-index: 0;
width: 100%;
height: 100%;
pointer-events: none;
}