Good day!
Tell me, please, can someone implement such a thing. There is a picture (round) r = 210. When moving the mouse clockwise, the picture is closed by a blue sector at the distance of the arc passed by the mouse. Ie if we move the mouse (figuratively speaking) up to 6 hours (we pass half a circle) - then on the left we get half of the picture, right blue semicircle, move for 9 hours - we see a quarter of the picture and 3/4 of the blue opaque blue circle. The change should occur smoothly, following the movement of the mouse. You can move clockwise and against (respectively, the opposite effect - we see more pictures).
Thank you for help! :)