#myDIV

{

width:300px;

height:200px;

background:red;

animation:mymove 5s infinite;

/*-webkit-  不知道是什么意思*/

-webkit-animation:mymove 2s infinite;

}

@keyframes mymove{

from {background-color:red;}

to {background-color:blue;}

}

@-webkit-keyframes mymove{

from {background-color:red;}

to {background-color:blue;}

}