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var
i:Integer;
rect:TRect;
begin
Self.Canvas.Pen.Style := psSolid;
Self.Canvas.Pen.Color := clRed;
rect.Left := 100;
rect.Right := 500;
rect.Bottom := 500;
rect.Top := 100;
for i := 0 to 3 do
begin
rect.Left := rect.Left + i*20;
rect.Right := rect.Right - i*20;
rect.Top := rect.Top + i*20;
rect.Bottom := rect.Bottom - i*20;
Self.Canvas.Ellipse(rect);
end;
end;