border-top: 30px solid #f00;
border-left: 60px solid #000;
border-right: 10px solid #000;
 
border-top: 30px solid #f00;
border-left: 60px solid #000;
border-right: 10px solid #000;
width:0;
height:0;
 
border-top: 30px solid #f00;
border-left: 60px solid #fff;
border-right: 10px solid #fff;
width:0;
height:0;
 
border-top: 20px solid #f00;
border-left: 20px solid #fff;
border-right: 20px solid #fff;
width:0;
height:0;
margin: 0 auto;

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