UnTube/backend/main/static/svg-loaders/grid.svg

<svg width="105" height="105" viewBox="0 0 105 105" xmlns="http://www.w3.org/2000/svg" fill="#fff">
    <circle cx="12.5" cy="12.5" r="12.5">
        <animate attributeName="fill-opacity"
         begin="0s" dur="1s"
         values="1;.2;1" calcMode="linear"
         repeatCount="indefinite" />
    </circle>
    <circle cx="12.5" cy="52.5" r="12.5" fill-opacity=".5">
        <animate attributeName="fill-opacity"
         begin="100ms" dur="1s"
         values="1;.2;1" calcMode="linear"
         repeatCount="indefinite" />
    </circle>
    <circle cx="52.5" cy="12.5" r="12.5">
        <animate attributeName="fill-opacity"
         begin="300ms" dur="1s"
         values="1;.2;1" calcMode="linear"
         repeatCount="indefinite" />
    </circle>
    <circle cx="52.5" cy="52.5" r="12.5">
        <animate attributeName="fill-opacity"
         begin="600ms" dur="1s"
         values="1;.2;1" calcMode="linear"
         repeatCount="indefinite" />
    </circle>
    <circle cx="92.5" cy="12.5" r="12.5">
        <animate attributeName="fill-opacity"
         begin="800ms" dur="1s"
         values="1;.2;1" calcMode="linear"
         repeatCount="indefinite" />
    </circle>
    <circle cx="92.5" cy="52.5" r="12.5">
        <animate attributeName="fill-opacity"
         begin="400ms" dur="1s"
         values="1;.2;1" calcMode="linear"
         repeatCount="indefinite" />
    </circle>
    <circle cx="12.5" cy="92.5" r="12.5">
        <animate attributeName="fill-opacity"
         begin="700ms" dur="1s"
         values="1;.2;1" calcMode="linear"
         repeatCount="indefinite" />
    </circle>
    <circle cx="52.5" cy="92.5" r="12.5">
        <animate attributeName="fill-opacity"
         begin="500ms" dur="1s"
         values="1;.2;1" calcMode="linear"
         repeatCount="indefinite" />
    </circle>
    <circle cx="92.5" cy="92.5" r="12.5">
        <animate attributeName="fill-opacity"
         begin="200ms" dur="1s"
         values="1;.2;1" calcMode="linear"
         repeatCount="indefinite" />
    </circle>
</svg>