mimilus minetest local variable

local walkinggrass = {}

walkinggrass.types = {
-----Material Name      Material Desc           Standart tile                   Craft                       tileup                                      tiledown            tileleft            tileright           tilebehind          tilefront
    {"endofroad",       "End of Road",          "",                             "castle:dirt",              "castle_endof_road_grass.png",              "",                 "",                 "",                 "",                 ""},
    {"crossroad",       "Cross Road",           "",                             "castle:dirt",              "default_dirt.png^default_grass_side.png"},
}

for _, row in ipairs(walkinggrass.types) do
    local name =             row[1]
    local desc =             row[2]
    local inv =              row[3] -- if alone , tile for all visible faces
    local craft_logical =    row[4]
    local tileup =           row[5]
    local tiledown =         row[6]
    local tileleft =         row[7]
    local tileright =        row[8]
    local tilebehind =       row[9]
    local tilefront =        row[10]
    local alltiles      -- Definition for all faces

    if inv == nil
        then    inv = "default_dirt.png^default_grass_side.png"
    end
    if tileup == nil
        then    tileup = tostring(inv)
    end
    if tiledown == nil
        then    tiledown = "default_dirt.png"
    end
    if tileleft == nil
        then    tileleft = inv
    end
    if tileright == nil
        then    tileright = inv
    end
    if tilebehind == nil
        then    tilebehind = inv
    end
    if tilefront == nil
        then    tilefront = inv
    end
--print(tostring(tileup))
--print(tostring(tiledown))
--print(tostring(tileleft))

minetest.register_node("castle:walking_grass_" ..name, {
    drawtype = "normal",
    paramtype = "light",
    paramtype2 = "facedir",
    description = "Walking Grass " ..desc,
    tiles = { tileup, tiledown, tileleft, tileright, tilebehind, tilefront },
    groups = {cracky=3},
    sounds = default.node_sound_dirt_defaults({
        footstep = {name="default_gravel_footstep", gain=0.5},
        dug = {name="default_gravel_footstep", gain=1.0},
    })
})

end