dig_volume

local args = {...}
local lenght = tonumber(args[1])
local width = tonumber(args[2])
local hight = tonumber(args[3])

local ceil_hight = (hight - hight % 3) / 3


local function do_line(distance)
    local pos = 0
    turtle.digUp()
    turtle.digDown()
    while pos < distance do
        turtle.dig()
        if turtle.forward() then
            pos = pos + 1
        end
        turtle.digUp()
        turtle.digDown()
    end
end


local function do_flat(side)
    for i=1, width do
        do_line(lenght-1)
        if i ~= width then
            if i % 2 == side then
                turtle.turnRight()
                do_line(1)
                turtle.turnRight()
            else
                turtle.turnLeft()
                do_line(1)
                turtle.turnLeft()
            end
        end
    end

end


local function do_volume()
    for i=1, ceil_hight do
        if width % 2 == 0 then
            if i % 2 == 0 then
                do_flat(0)
            else
                do_flat(1)
            end
        else
            do_flat(1)
        end
        turtle.turnLeft()
        turtle.turnLeft()
        if i ~= ceil_hight then
            local step_up = 1
            while step_up <= 3 do
                turtle.digUp()
                if turtle.up() then
                    step_up = step_up + 1
                end
            end
        end
    end
end


local function come_back()
    if ceil_hight % 2 == 0 then
        print("x")
    else
        if width % 2 == 1 then
            do_line(lenght-1)
            turtle.turnRight()
        else
            turtle.turnLeft()
        end
        do_line(width-1)
        turtle.turnRight()
    end
    local step_down = 1
    while step_down < ceil_hight*3 -2 do
        turtle.digDown()
        if turtle.down() then
            step_down = step_down + 1
        end
    end
end

do_volume()
come_back()