switches={
    list={},
    col=0,

    reset=function()
        switches.list={}
    end,

    add=function(switch)
        if not switch.w then switch.w=1 end
        if not switch.h then switch.h=1 end
        table.insert(switches.list, switch)
    end,

    search=function(x,y)
        for i,v in ipairs(switches.list) do
            if x>=v.x and x<v.x+v.w and y>=v.y and y<v.y+v.h then
                return v
            end
        end
        return nil
    end,

    draw=function()
        text(#switches.list,1,25,8)
        if switches.col<16 then
            for i,v in ipairs(switches.list) do
                draw.rect(v.x*8, v.y*8, (v.w+1)*8, (v.h)*8, 8);
            end
        end
        switches.col=(switches.col+1)%32
    end,
}