how to implement gradient arcs/circles
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 Hi everyone, Im currently working on a UI for M5Dial and got this idea from the image attached for making four quadrants or arcs and then adding functionality. 
 i have got the functionality right but i dont understand how to get the fading effect or gradient effect on the arcs.im using platformIO right now 
 If anyone has inputs, kindly reply, Thanks. 
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 @mukul_100_ i would recommend to study some of YT VolosR examples of his approach to UI 
