hook.Add( "PostDrawOpaqueRenderables", "example", function()

        if CLIENT then
            if ticked then

                cam.Start3D2D(self:GetPos(),Angle(0,0,0),1)

                    draw.RoundedBox(0,100,100,100,100,Vector(0,255,255))

                cam.End3D2D()

            end

        end
end)