<!-- By Sam Herbert (@sherb), for everyone. More @ http://goo.gl/7AJzbL -->
<svg width="120" height="30" viewBox="0 0 120 30" xmlns="http://www.w3.org/2000/svg" fill="#222D35">
    <circle cx="15" cy="15" r="15">
        <animate attributeName="r" from="15" to="15"
                 begin="0s" dur="0.8s"
                 values="15;9;15" calcMode="linear"
                 repeatCount="indefinite" />
        <animate attributeName="fill-opacity" from="1" to="1"
                 begin="0s" dur="0.8s"
                 values="1;.5;1" calcMode="linear"
                 repeatCount="indefinite" />
    </circle>
    <circle cx="60" cy="15" r="9" fill-opacity="0.3">
        <animate attributeName="r" from="9" to="9"
                 begin="0s" dur="0.8s"
                 values="9;15;9" calcMode="linear"
                 repeatCount="indefinite" />
        <animate attributeName="fill-opacity" from="0.5" to="0.5"
                 begin="0s" dur="0.8s"
                 values=".5;1;.5" calcMode="linear"
                 repeatCount="indefinite" />
    </circle>
    <circle cx="105" cy="15" r="15">
        <animate attributeName="r" from="15" to="15"
                 begin="0s" dur="0.8s"
                 values="15;9;15" calcMode="linear"
                 repeatCount="indefinite" />
        <animate attributeName="fill-opacity" from="1" to="1"
                 begin="0s" dur="0.8s"
                 values="1;.5;1" calcMode="linear"
                 repeatCount="indefinite" />
    </circle>
</svg>