<div id="three"></div>
#three{
  width:400px;
  height:700px;
  background:green;
  clip-path: polygon(50% 0%, 80% 30%, 70% 30%, 90% 50%, 80% 50%, 100% 70%, 60% 70%, 60% 80%, 40% 80%, 40% 70%, 0% 70%, 20% 50%, 10% 50%, 30% 30%, 20% 30%);
}



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