Бесконечная анимация на CSS
Подскажите пожалуйста как реализовать бесконечную анимацию кнопки коллбэка. есть вот такая вот кнопка. при наведении она изменяется с трубки телефона на надпись заказать звонок. нужно сделать чтобы это работало не при наведении. а просто бесконечно повторялось с определенным интервалом. в CSS анимации мало что шарю. кто может помогите плиз. 
.pulse, .bloc, .phone {
position: absolute;
width: 90px;
height: 90px;
color: #fff;
text-align: center;
border-radius: 50%;
}
.bloc {
cursor: pointer;
z-index: 1;
overflow: hidden;
transition:.3s;
animation:hoverWaver linear 1s infinite;
}
.pulse {
background: #f44336;
position: relative;
transition: .5s;
}
.phone {
margin-top: 19px;
font-size: 50px;
line-height: 94px;
/*animation: phone .9s ease-in-out infinite;*/
}
.text {
position: absolute;
opacity: 0;
text-transform: uppercase;
font-weight: 700;
top: 28px;
font-size: 13px;
transform: scaleX(-1);
transition: .5s ease-in-out;
}
.phone i {
transition: .5s ease-in-out;
}
.pulse:hover {
background: #f44336;
animation-iteration-count:infinite;
-moz-animation-iteration-count:infinite;
-webkit-animation-iteration-count:infinite;
}
.pulse:hover i {
transition: .5s ease-in-out;
transform: scale(0);
}
.pulse:hover .text {
transform: scaleX(1);
transition: .5s ease-in-out;
opacity: 1;
}
.pulse:hover::before,
.pulse:hover::after {
content: '';
position: absolute;
border: 1px solid #f44336;
left: -20px;
right: -20px;
top: -20px;
bottom: -20px;
border-radius: 50%;
animation: pulse 1.8s linear infinite;
opacity: 0;
}
.pulse:hover::after {
animation-delay: .5s;
}
@-webkit-keyframes hoverWaver {
0% {
box-shadow:0 8px 10px rgba(244,67,54,0.3),0 0 0 0 rgba(244,67,54,0.2),0 0 0 0 rgba(244,67,54,0.2)
}
40% {
box-shadow:0 8px 10px rgba(244,67,54,0.3),0 0 0 15px rgba(244,67,54,0.2),0 0 0 0 rgba(244,67,54,0.2)
}
80% {
box-shadow:0 8px 10px rgba(244,67,54,0.3),0 0 0 30px rgba(244,67,54,0),0 0 0 26.7px rgba(244,67,54,0.067)
}
100% {
box-shadow:0 8px 10px rgba(244,67,54,0.3),0 0 0 30px rgba(244,67,54,0),0 0 0 40px rgba(244,67,54,0.0)
}
}@keyframes hoverWaver {
0% {
box-shadow:0 8px 10px rgba(244,67,54,0.3),0 0 0 0 rgba(244,67,54,0.2),0 0 0 0 rgba(244,67,54,0.2)
}
40% {
box-shadow:0 8px 10px rgba(244,67,54,0.3),0 0 0 15px rgba(244,67,54,0.2),0 0 0 0 rgba(244,67,54,0.2)
}
80% {
box-shadow:0 8px 10px rgba(244,67,54,0.3),0 0 0 30px rgba(244,67,54,0),0 0 0 26.7px rgba(244,67,54,0.067)
}
100% {
box-shadow:0 8px 10px rgba(244,67,54,0.3),0 0 0 30px rgba(244,67,54,0),0 0 0 40px rgba(244,67,54,0.0)
}
}
@keyframes phone {
0%, 100% {
transform: rotate(-20deg);
}
50% {
transform: rotate(21deg);
}
}
@keyframes pulse {
0% {
transform: scale(0.5);
opacity: 0;
}
50% {
opacity: 1;
}
100% {
transform: scale(1.2);
opacity: 0;
}
}
<div class="dws">
<div class="pulse">
<div class="bloc"></div>
<div class="phone"><i class="fa fa-phone" aria-hidden="true"></i></div>
<div class="text">Заказать звонок</div>
</div>
</div>