Simple Area Miner

local arg = { ... }
local width = tonumber(arg[1])
local height = tonumber(arg[2])
local length = tonumber(arg[3])

function handleFuel()
    if turtle.getFuelLevel() == 0 then
        while not turtle.refuel(1) do
            print('insert fuel in slot 1')
        end
    end
end

function moveForward()
    handleFuel()
    turtle.forward()
end

function moveUp()
    handleFuel()
    turtle.up()
end

function digArea()
    turtle.dig()
    moveForward()

    for y = 1, height do
        for x = 1, width do
            for z = 1, length-1 do
                turtle.dig()
                moveForward()
            end

            if x < width then
                if x % 2 == 1 then
                    turtle.turnRight()
                    turtle.dig()
                    moveForward()
                    turtle.turnRight()
                else
                    turtle.turnLeft()
                    turtle.dig()
                    moveForward()
                    turtle.turnLeft()
                end
            end
        end

        if y < height then
            turtle.digUp()
            moveUp()
            turtle.turnRight()
            turtle.turnRight()
        end
    end
end

digArea()