<a href="#0"class="icon-expand-link">
  <svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="128" height="32" viewBox="0 0 128 32">
	  <path class="expand" d="M32 0v12l-4.321-4.321-6.625 6.625-3.359-3.359 6.625-6.625-4.321-4.321zM7.679 4.321l6.625 6.625-3.359 3.359-6.625-6.625-4.321 4.321v-12h12zM27.679 24.321l4.321-4.321v12h-12l4.321-4.321-6.625-6.625 3.359-3.359zM14.304 21.054l-6.625 6.625 4.321 4.321h-12v-12l4.321 4.321 6.625-6.625z"></path>
    <path class="contract" d="M2 18h12v12l-4.321-4.321-6.313 6.313-3.359-3.359 6.313-6.313zM25.679 22.321l6.313 6.313-3.359 3.359-6.313-6.313-4.321 4.321v-12h12zM30 14h-12v-12l4.321 4.321 6.313-6.313 3.359 3.359-6.313 6.313zM9.679 6.321l4.321-4.321v12h-12l4.321-4.321-6.313-6.313 3.359-3.359z"></path>
  </svg>
</a>

body {
  padding: 30px;
}

.icon-expand-link .contract {
  display: none;
}
.icon-expand-link:hover .expand {
  display: none;
}
.icon-expand-link:hover .contract {
  display: block;
}