k-on gif header

<style>

main:before {

 box-shadow: 0 0 1px #000000;

 border: solid 1px #000000;

      height: 300px; 

      display: block;

      content: " ";

      background-image: url('https://giffiles.alphacoders.com/349/34970.gif');

      background-position: center 70%;

      background-size: cover;

      margin-bottom: 7px;

}

</style>