BUG: the speed of the blob is affected by the screen FPS

[gmrchk]

Describe your issue:
When running Blobity on screens which support 120fps like new Macs, the blob animation is quicker than it should be due to the animation relying on the requestAnimationFrame, which can fire at different rates by default.

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• Have you checked closed issues for similar/related problems?
• Have you provided all helpful information available?
• Have you considered creating a demo repository, or a link to your running project where the problem is reproducible?