CODE EXAMPLE FOR HTML

loading screen svg and css animation

<svg width="500px" height="500px" viewBox="0 0 500 500">
 
    <rect x="250" y="250" width="50" height="50" fill="#4bc0c8">
        <animateTransform attributeName="transform" type="rotate" begin="0s" dur="10s" from="0 200 200" to="360 400 400" repeatCount="indefinite" />
    </rect>
     
</svg>