Salve ragazzi, ho trovato questo script per un ribbon menu fantastico, purtroppo nonostante gli sforzi non sono riuscito a girarlo di 90 gradi, vorrei anche specchiare i due estremi mettendo gli spigoli in entrambi i lati, mi sapreste aiutare?

Di seguito il codice
codice:
<style type="text/css">#ribbon {
  width: 180px;
  height: 280px;
  margin: 50px auto 0;
  position: relative;
  overflow: hidden;
}


#ribbon .inset {
  width: 200px;
  height: 55px;
  position: absolute;
  top: -50px;
  left: -10px;
  z-index: 5;
  
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  border-radius: 50%;
  
  background: rgba(0,0,0,0.3);
  
  box-shadow: 0px 5px 10px 0px rgba(0,0,0,0.3);
  -moz-box-shadow: 0px 5px 10px 0px rgba(0,0,0,0.3);
  -webkit-box-shadow: 0px 5px 10px 0px rgba(0,0,0,0.3);
}


#ribbon .container {
  position: relative;
  width: 100px;
  height: 250px;
  overflow: hidden;
  margin: 0 auto;
  border-left: 1px solid #631a15;
  border-right: 1px solid #631a15;
}


#ribbon .base {
  height: 200px;
  width: 100px;
  
  background: rgb(199,59,60);
  background: -moz-linear-gradient(top,  rgba(199,59,60,1) 0%, rgba(184,32,31,1) 100%);
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(199,59,60,1)), color-stop(100%,rgba(184,32,31,1)));
  background: -webkit-linear-gradient(top,  rgba(199,59,60,1) 0%,rgba(184,32,31,1) 100%);
  background: -o-linear-gradient(top,  rgba(199,59,60,1) 0%,rgba(184,32,31,1) 100%);
  background: -ms-linear-gradient(top,  rgba(199,59,60,1) 0%,rgba(184,32,31,1) 100%);
  background: linear-gradient(top,  rgba(199,59,60,1) 0%,rgba(184,32,31,1) 100%);
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#c73b3c', endColorstr='#b8201f',GradientType=0 );


  position: relative;
  z-index: 2;
}


#ribbon .base:after {
  content: '';
  position: absolute;
  top: 0;
  width: 86px;
  left: 6px;
  height: 242px;
  border-left: 1px dashed #631a15;
  border-right: 1px dashed #631a15;
}


#ribbon .base:before {
  content: '';
  position: absolute;
  top: 0;
  width: 86px;
  left: 7px;
  height: 242px;
  border-left: 1px dashed #da5050;
  border-right: 1px dashed #da5050;
}


#ribbon .left_corner {
  width: 100px;
  height: 100px;
  background: #b8201f;
  position: absolute;
  bottom: 20px;
  left: -50px;
  z-index: 1;
  
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
}


#ribbon .right_corner {
  width: 100px;
  height: 100px;
  background: #b8201f;
  position: absolute;
  bottom: 20px;
  right: -50px;
  z-index: 1;
  
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
}
</style>


<html>
<body>
<div id="ribbon">
  
  <div class="inset"></div>
  
  <div class="container">
    <div class="base"></div>
    <div class="left_corner"></div>
    <div class="right_corner"></div>
  </div>


</div>
</body>
</html>