Add ring element to the gameplay element

[HelloYeew]

Add the ring element that's a main playfield on main gameplay field.

Problem

The Maimai playfield is mainly a circle white the white border and the 'sensor' on the ring corner. So I try using this method

new Circle
{
    Anchor = Anchor.Centre,
    Origin = Anchor.Centre,
    RelativeSizeAxes = Axes.Both,
    Colour = Color4.White.Opacity(0.5f),
    BorderThickness = 10,
    BorderColour = Color4.White,
    Masking = true
}

And the result is like this

The goal of this ring is it must have only the white border and its circle color must be transparent or only white with very low transparency but when I using this method the border color is depend on the transparency using inside the circle (like I set inside as 0.5f so the border is 0.5f too) Needing to investigate on this.

[Game4all]

apart from the visual issue, code looks fine.