work - dig blocks

-- command line args  -  x, y, levels, updown, left, items

local x, y, levels, updown, left, items = tonumber(arg[1]), tonumber(arg[2]), tonumber(arg[3]), tonumber(arg[4]), tonumber(arg[5]), tonumber(arg[6])

function dig()
    while turtle.inspect() do
        turtle.dig()
    end
    turtle.forward()
    if updown then
        while turtle.inspectUp() do
            turtle.digUp()
        end
        turtle.digDown()
    end
end

function move(num)
    print(num)
    for i = 1, tonumber(num) do
        turtle.forward()
    end
end

for c = 1, levels do
    for a = 1, x do
        for b = 1, y do
            if b < y then
                dig()
            end
        end
        if a < x then
            if left == 1 and a % 2 == 1 then
                turtle.turnLeft()
                dig()
                turtle.turnLeft()
            elseif left == 1 and a % 2 == 0 then
                turtle.turnRight()
                dig()
                turtle.turnRight()
            elseif left == 0 and a % 2 == 0 then
                turtle.turnLeft()
                dig()
                turtle.turnLeft()
            else
                turtle.turnRight()
                dig()
                turtle.turnRight()
            end
        end
        if items == 1 then
            -- add items to ender chest
            turtle.select(1)
            turtle.placeUp()
            for i = 16, 1, -1 do
                turtle.select(i)
                turtle.dropUp()
            end
            turtle.digUp()
        end
    end
    -- returnToStartXY
    -- if x is odd
    if x % 2 == 1 then
        print("x is odd moveY: "..y)
        turtle.turnLeft()
        turtle.turnLeft()
        move(y)
    end
    -- if x is even and not left
    if left == 0 then
        print("not left: "..left)
        turtle.turnRight()
        move(x)
        turtle.turnRight()
    else
        print("left: "..left)
        turtle.turnLeft()
        move(x)
        turtle.turnLeft()
    end

    if c < levels then
        turtle.down()
        turtle.digDown()
        if updown then
            for i = 1, 2 do
                turtle.down()
                turtle.digDown()
            end
        end
    end
end