*,
*:before,
*:after{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body{
    background-color: #e5e5fa;
}
.pulse{
    height: 150px;
    width: 150px;
    background: linear-gradient(
        #8a82fb,
        #407ed7
    );
    position: absolute;
    margin: auto;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-size: 50px;
    color: #ffffff;
}
.pulse:before,
.pulse:after{
    content: "";
    position: absolute;
    height: 100%;
    width: 100%;
    background-color: #8a82fb;
    border-radius: 50%;
    z-index: -1;
    opacity: 0.7;
}
.pulse:before{
    animation: pulse 2s ease-out infinite;
}
.pulse:after{
    animation: pulse 2s 1s ease-out infinite;
}
@keyframes pulse{
    100%{
        transform: scale(2.5);
        opacity: 0;
    }
}