Kırmızı Css yan menü

#cssmenu,
#cssmenu ul,
#cssmenu ul li,
#cssmenu ul li a {
  margin: 0;
  padding: 0;
  border: 0;
  list-style: none;
  line-height: 1;
  display: block;
  position: relative;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
#cssmenu {
  width: 180px;
  z-index: 10;
}
#cssmenu ul {
  border: 1px solid #cccccc;
  border-radius: 5px;
  background: #ffffff;
  background: -moz-linear-gradient(bottom, #f0f0f0, #ffffff);
  background: -webkit-linear-gradient(bottom, #f0f0f0, #ffffff);
  background: -o-linear-gradient(bottom, #f0f0f0, #ffffff);
  background: -ms-linear-gradient(bottom, #f0f0f0, #ffffff);
  background: linear-gradient(to top, #f0f0f0, #ffffff);
}
#cssmenu ul li {
  display: block;
  border-bottom: 1px solid #cccccc;
}
#cssmenu ul li.active {
  border-bottom: 0;
}
#cssmenu ul li:last-child {
  border-bottom: 0;
}
#cssmenu ul li a {
  display: block;
  padding: 14px 12px;
  font-family: Helvetica, Arial, sans-serif;
  font-size: 16px;
  font-weight: bold;
  text-decoration: none;
  color: #444444;
}
#cssmenu ul li.active {
  left: -8px;
  width: 194px;
  padding: 2px;
  background: #ce4c4a;
  background: -moz-linear-gradient(bottom, #c43735, #d56462);
  background: -webkit-linear-gradient(bottom, #c43735, #d56462);
  background: -o-linear-gradient(bottom, #c43735, #d56462);
  background: -ms-linear-gradient(bottom, #c43735, #d56462);
  background: linear-gradient(to top, #c43735, #d56462);
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.25);
}
#cssmenu ul li.active > a {
  padding: 12px 12px 12px 16px;
  border-left: 1px dashed #de8886;
  border-top: 1px dashed #de8886;
  border-bottom: 1px dashed #de8886;
  color: #ffffff;
  text-shadow: 0 1px 1px #8c2726;
}
#cssmenu ul li.active:after {
  position: absolute;
  right: -16px;
  top: 7px;
  width: 31.526911934581186px;
  height: 31.526911934581186px;
  background: #ce4c4a;
  background: -moz-linear-gradient(-45deg, #c43735, #d56462);
  background: -webkit-linear-gradient(-45deg, #c43735, #d56462);
  background: -o-linear-gradient(-45deg, #c43735, #d56462);
  background: -ms-linear-gradient(-45deg, #c43735, #d56462);
  background: linear-gradient(-45deg, #c43735, #d56462);
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
  content: "";
}
#cssmenu ul li.active:before {
  position: absolute;
  right: -12px;
  top: 9px;
  z-index: 10;
  width: 28.526911934581186px;
  height: 28.526911934581186px;
  border-right: 1px dashed #e9afae;
  border-top: 1px dashed #e9afae;
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
  content: "";
}
#cssmenu ul li.active a:after {
  position: absolute;
  bottom: -7px;
  left: -11px;
  z-index: -1;
  width: 0;
  height: 0;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 8px solid transparent;
  border-right: 8px solid #982b29;
  content: "";
}

<div id='cssmenu'>
<ul>
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</ul>
</div>