.bot-typing {
    position: relative;
    width: 40px;
    height: 10px;
}

    .bot-typing span {
        content: "";
        -webkit-animation: blink 1.5s infinite;
        animation: blink 1.5s infinite;
        -webkit-animation-fill-mode: both;
        animation-fill-mode: both;
        height: 10px;
        width: 10px;
        background: #3b5998;
        position: absolute;
        left: 0;
        top: 0;
        border-radius: 50%;
    }

        .bot-typing span:nth-child(2) {
            -webkit-animation-delay: 0.2s;
            animation-delay: 0.2s;
            margin-left: 15px;
        }

        .bot-typing span:nth-child(3) {
            -webkit-animation-delay: 0.4s;
            animation-delay: 0.4s;
            margin-left: 30px;
        }

@-webkit-keyframes blink {
    0% {
        opacity: 0.1;
    }

    20% {
        opacity: 1;
    }

    100% {
        opacity: 0.1;
    }
}

@keyframes blink {
    0% {
        opacity: 0.1;
    }

    20% {
        opacity: 1;
    }

    100% {
        opacity: 0.1;
    }
}