CSS3 @keyframes简单动画实现

@keyframes animationname {keyframes-selector {css-styles;}}

@keyframes mymove
{
    0%   {top:0px;}
    25%  {top:200px;}
    75%  {top:50px}
    100% {top:100px;}
}

@-webkit-keyframes mymove /* Safari and Chrome */
{
    0%   {top:0px;}
    25%  {top:200px;}
    75%  {top:50px}
    100% {top:100px;}
}
//多个特性变化，用;隔开.

@-webkit-keyframes mymove{

0% {top:0px; left:0px; background:red;}
25% {top:0px; left:100px; background:blue;}
50% {top:100px; left:100px; background:yellow;}
75% {top:100px; left:0px; background:green;}
100% {top:0px; left:0px; background:red;}
}

{
    animation:mymove 5s infinite;
    -webkit-animation:mymove 5s infinite; /* Safari and Chrome， infinite表示无限次循环，也可设置次数n：
                                           animation-interation-count:n*/ 
}