Grey shape

show code

size(400, 400);
fill(255);
noStroke();
ellipse(width/2, height/2, width, height);
fill(200);
ellipse(width/2, height/2, width-20, height-20)
fill(155);
ellipse(width/2, height/2, width -40, height-40);
fill(100);
ellipse(width/2, height/2, width-60, height-60)
fill(55);
ellipse(width/2, height/2, width-80, height-80);
fill(255);
noStroke();
ellipse(width/2, height/2, width-80, height-200);
ellipse(width/2, height/2, width-200, height-80);
fill(200)
ellipse(width/2, height/2, width-220, height-100);
ellipse(width/2, height/2, width-100, height-220);
fill(155);
ellipse(width/2, height/2, width-240, height-120);
ellipse(width/2, height/2, width-120, height-240);
fill(100);
ellipse(width/2, height/2, width-260, height-140);
ellipse(width/2, height/2, width-140, height-260);
fill(55);
ellipse(width/2, height/2, width-280, height-160);
ellipse(width/2, height/2, width-160, height-280);
fill(255);
ellipse(width/2, height/2, 140, 140);
fill(200)
ellipse(width/2, height/2, 120, 120)
fill(155);
stroke();
ellipse(width/2, height/2, 100, 100);
fill(100);
ellipse(width/2, height/2, 80, 80);
fill(55);
ellipse(width/2, height/2, 60, 60);

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