CSS : CSS circle border fill animation

CSS : CSS circle border fill animation
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On Google, Search for "hows tech developer connect"

I promised to share a hidden feature with you, and here it is.
This is a YouTube's feature which works on Desktop.
First, Make sure this video is playing.
Then, type the letters 'awesome' on the keyboard.
The progress bar on YouTube will be altered to a flashing rainbow.

A brief introduction of myself,
Hi, my name is Delphi, nice to meet you.
I can assist you in discovering answers to your inquiries.
CSS : CSS circle border fill animation
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: circle CSS CSS border fill animation