Black <a href="https://en.wikipedia.org/wiki/Spider_web" class="extiw" title="en:Spider web">spider web</a> icon.
<a rel="nofollow" class="external text" href="http://thenounproject.com/BL4CK_K1N6/">Denis Frezzato</a>
CC BY 3.0
<a rel="nofollow" class="external text" href="http://thenounproject.com/noun/spider-web/#icon-No813">The Noun Project</a>