Gave a little try to the right animation of @Prathyush shot.
It's not 100% exactly the same, but CSS has some limitations (speaking about the spiral animation, tough one).
Also seems like you can't animate background position in two steps (appearing for the bottom while the border circle comes from above).
Seems like i can't find out how to rewind the animation after a certain time, so if you have an idea, feel free to give your advice.
Give it a try!
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