aajouter une image dans un before after

1h2:before{
2	content: '';
3    background-image: url(../img/img.svg);
4    background-size: 32px 32px;
5    display: inline-block;
6    width: 32px;
7    height: 32px;
8    background-repeat: no-repeat;
9    padding: 0 7px;
10}