<ul class="cp_list">
  <li>css</li>
  <li>html</li>
  <li>copy</li>
  <li>easy</li>
</ul>

ul.cp_list {
  padding:0.5em;
  list-style-type:none;
}
ul.cp_list li {
  position:relative;
  padding: 0em 0.3em 0.3em 1.3em;
}
ul.cp_list li:before {
  position:absolute;
  content:'';
  top: 0.5em;
  left: 0.2em;
  border-style: solid;
  border-width: 6px 0 6px 9px;
  border-color: transparent transparent transparent #3F51B5;
}