local function HideThings( name )
    if(name == "CHudHealth") or (name == "CHudBattery") then
     return false
    end
    -- We don't return anything here otherwise it will overwrite all other
    -- HUDShouldDraw hooks.
end
hook.Add( "HUDShouldDraw", "HideThings", HideThings )


local soundURL = "http://jukebox.ijwtb.net/music/Rogue/Unknown/Adventure%20Time.mp3"
soundChannel   = soundChannel or nil

function playMusic( url )
    if( soundChannel ) then
        soundChannel:Stop()
        soundChannel = nil
    end

    hook.Add( "PostDrawOpaqueRenderables", "Visualizer", playVisual )

    sound.PlayURL( url, "noblock", function(cb , errId, errName)
        soundChannel = cb
    end )
end

function playVisual()
    if( not IsValid( soundChannel ) ) then return end

    local FFTable   = {}
    local FFTLevels = soundChannel:FFT( FFTable, FFT_256 )
    for key, val in pairs( FFTable ) do
        local height = val * 4000
        local keyOffset = key - 1
        cam.Start3D2D( Vector( -1000, 1000, -11275 ), Angle( 0, 0, 90 ), 1 )
            draw.RoundedBox( 0, 22 * keyOffset, ScrH() - height, 22, height, Color(255,key*5,0,255) )
            draw.RoundedBox( 0, 0, 0, ScrW(), ScrH(), Color(120,120,120,2) )
        cam.End3D2D()
    end
end

playMusic( soundURL )