blockquote{margin-right:30%;background-color:#fff;border:2px solid #000;padding:40px;font-size:30px;font-weight:bold;margin-bottom:40px;position:relative;}
.right blockquote{margin-right:0;margin-left:30%;}
blockquote::before,blockquote::after{content:'';position:absolute;top:calc(100% - 3.2px);right:30px;display:inline-block;height:0;width:0;border-top:32px solid #fff;border-right:25px solid transparent;border-left:25px solid transparent;}
blockquote::before{top:100%;border-top-color:#000;}
.right blockquote::before, .right blockquote::after{right:auto;left:30px;}
.center blockquote::before, .center blockquote::after{left:50%;transform:translateX(-50%);}