Hold 'E' GUI curved line, how can I do that?

Hello! so I really like the style that they used in Jailbreak/Fortnite whenever you hold E on jailbreak it makes that white line curvy and filling it all the way to the top.

when ever you hold a bound key in fortnite:
image

I really want to know how I would be able to make this, support is appreciated.
Here’s Mine:
image

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Here’s a great module for circular sprites.

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As far as I can tell, there are 2 methods of doing it, and with a transparent background restriction, maybe only one.

  1. Use images of half an arc, along with tricks to mask and rotate them at different times.
  2. Generate a sprite sheet of a bar filling. In game, swap to the appropriate section of the sprite sheet as it fills in.
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