Подскажите, какой это язык?

local mod = {}
local aux = {}

aux.width = false
aux.height = false
aux.sx = false
aux.sy = false
aux.grid = false

function aux.createGrid (rows, columns)
  local MazeGrid = {}

  for y = 1, rows do 
    MazeGrid[y] = {}
    for x = 1, columns do
      MazeGrid[y][x] = {bottom_wall = true, right_wall = true}
    end
  end  
  return MazeGrid
end

function mod.createMaze(x1, y1, x2, y2, grid)
  aux.height, aux.width, aux.sx, aux.sy = y2, x2, x1, y1
  aux.grid = grid or aux.createGrid(y2, x2)
  aux.sidewinder()
  return aux.grid
end

function aux.sidewinder()
  local cx = aux.sx
for y = aux.sy, aux.height do
    for x = aux.sx, aux.width do 
      if y ~= aux.sy then
        if math.random(0, 1) == 0 and x ~= aux.width then
          aux.grid[y][x].right_wall = false
        else 
          aux.grid[y-1][math.random(cx, x)].bottom_wall = false

          if x ~= aux.width then
            cx = x+1
          else 
            cx = aux.sx
          end
        end
      else 
        if x ~= aux.width then 
          aux.grid[y][x].right_wall = false 
        end
      end
    end
  end
end

return mod