/*[https://codepen.io/letsbleachthis/pen/YJgNpv]*/
.globo-chat {
  min-width: 300px;
  max-width: 500px;
  margin: auto;
}

.globo-chat > div {
	position: relative;
	background: #000;
	border-radius: .4em;
	color: white ;
	padding: 20px ;
	margin: 20px ;
	z-index: 10 ;
	border: 10px solid black ;
}

.globo-chat > div:after {
	content: '';
	position: absolute;
	left: 0;
	top: 50%;
	width: 0;
	height: 0;
	border: 25px solid transparent;
	border-right-color: #000;
	border-left: 0;
	border-top: 0;
	margin-top: -12.5px;
	margin-left: -25px;
    z-index: 5 ;    
}
.globo-chat > div:nth-child(even) {
    text-align: right ;
    margin-left: 20px ;
}
.globo-chat > div:nth-child(even):after {
	content: '';
	position: absolute;
	left: 106%;
	top: 50%;
	width: 0;
	height: 0;
	border: 25px solid transparent;
	border-left-color: #000;
	border-right: 0;
	border-top: 0;
	margin-top: -12.5px;
	margin-right: -25px;
}