div
{
width:100px;
height:100px;
background:red;
position:relative;

}

div:hover
{
animation:mymove 1s ease-out;
-webkit-animation:mymove 2s infinite; /* Safari and Chrome */
}

@keyframes mymove
{
from {transform:scale(1,1);}
to {transform:scale(1.5,1.5);}
}

@-webkit-keyframes mymove /* Safari and Chrome */
{
from {transform:scale(1,0);}
to {transform:scale(2,0);}
}