牌面翻转

gistfile1.js

var t = new Date().getTime()
function getTime() {
	return (new Date().getTime()-t)/1000;
}

function fun(n,order) {
	console.log(getTime(),"卡片" + n + "正面")
	setTimeout(function(){
		console.log(getTime(),"卡片" + n + "反面")
		setTimeout(function(){
			fun((n+1)%4, order+1)
		}, (order +1) * 5000)	
	}, 5000)
}
setTimeout(function(){fun(0,1)},5000)