.btnripple2{
	position: relative;
	display:inline-block;
	background:#666;
	width:70px;
	height:70px;
	border-radius: 50%;
	color:#ccc;
	outline: none;
	 transition: all .7s;
}
.btnripple2:hover{
	background:#333;	
}
.btnripple2::after,
.btnripple2::before {
    content: '';
    position: absolute;
    left: -25%;
    top: -25%;
    border: 1px solid #777;
    width: 150%;
    height: 150%;
    border-radius: 50%;
    opacity: 1;

    animation:1.5s circleanime linear infinite;
}
.btnripple2::before {
    animation-delay:.5s; 
}
@keyframes circleanime{
	0%{
	  transform: scale(0.68);
	}
	100%{
		transform: scale(1.2);
		opacity: 0;
	}
}

.btnripple2 span::after {
    content: '';
    position: absolute;
    top: 37%;
    left: 45%;
    /*矢印の形状*/
    border: 14px solid transparent;
    border-top-width: 10px;
    border-bottom-width: 10px;
    border-left-color: #fff;
}