#welcome {
    width: 200px; height: 200px;
    margin: auto;
    border-radius: 100px;
    cursor: pointer;    
    background: #37f url(../svg/012b-ex.svg);
    background-position: 20% 20%;
    background-size: 20px 20px;   
    -moz-transition: background-size 1s linear 0 , width 1s linear 0 , height 1s linear 0;
	-webkit-transition: background-size 1s linear 0 , width 1s linear 0 , height 1s linear 0;
	-o-transition: background-size 1s linear 0 , width 1s linear 0 , height 1s linear 0;
	-ms-transition: background-size 1s linear 0 , width 1s linear 0 , height 1s linear 0;
	transition: background-size 1s linear 0 , width 1s linear 0 , height 1s linear 0;
}
#welcome:hover {
    background-size: 200px 200px;
}