Circling ⚫⚪
https://www.dwitter.net/d/25336
with(x)t?beginPath(fill()):A=[globalCompositeOperation='xor'],arc(X=Math.random(Z=2e3)*Z,Y=X**5%Z,(A.map(a=>Z=(r=Math.hypot(a.X-X,a.Y-Y))<(z=a.Z)?z*.8-r:r<z+Z?r-z:Z),Z>0?Z:0),!A.push({X,Y,Z}),9)
https://www.dwitter.net/d/25336
with(x)t?beginPath(fill()):A=[globalCompositeOperation='xor'],arc(X=Math.random(Z=2e3)*Z,Y=X**5%Z,(A.map(a=>Z=(r=Math.hypot(a.X-X,a.Y-Y))<(z=a.Z)?z*.8-r:r<z+Z?r-z:Z),Z>0?Z:0),!A.push({X,Y,Z}),9)