local G_Backup = {}

function deepCopy(tab)
  local had_tables = {}
  local function hadAlready(tab)
    for i,v in pairs(had_tables) do
      if v.val == tab then
        return true
      end
    end
    return false
  end

  local function useClone(tab)
    for i,v in pairs(had_tables) do
      if v.val == tab then
        return v.alt
      end
    end
  end

  local function setHad(val,alt)
    local v = {}
    v.val = val
    v.alt = alt
    had_tables[#had_tables+1] = v
  end

  local function d_copy(tab,n_tab)
    for i,v in pairs(tab) do
      if type(v) ~= "table" then
        n_tab[i] = v
      else
        if hadAlready(v) then
          n_tab[i] = useClone(v)
        else
          local next_tab = {}
          setHad(v,next_tab)
          n_tab[i] = d_copy(v,next_tab)
        end
      end
    end
    return n_tab
  end

  local next_tab = {}
  setHad(tab,next_tab[i])
  return d_copy(tab,next_tab)
end

_G.reset = function()
  _G = deepCopy(G_Backup)
end


G_Backup = deepCopy(_G)