quarry.lua

local chunksize = 16
local start_height = 64
local stop_height = 12

function digForward()
    while true do
        if turtle.forward() then
            break
        else
            turtle.dig()
            turtle.attack()
        end
    end
end

function slice()
    for i=0,chunksize-2 do
        digForward()
    end
end

function emptyInv()
    for i=1,15 do
        turtle.select(i)
        turtle.drop(turtle.getItemCount(i))
    end
    turtle.select(1)
end
local current_height = start_height;
for i=stop_height,start_height do


    print("remove flat")
    for i=0,6 do
        slice()

        turtle.turnRight()
        digForward()
        turtle.turnRight()
        slice()

        turtle.turnLeft()
        digForward()
        turtle.turnLeft()
    end

    slice()

    turtle.turnRight()
    digForward()
    turtle.turnRight()
    slice()

    --back to start
    print("back to start")

    turtle.turnRight()
    slice()


    while true do
        print("start empty")
        if current_height == start_height then
            turtle.turnLeft()
            emptyInv()
            turtle.turnLeft()
            turtle.turnLeft()

            while turtle.down() == true do
                turtle.down()
                current_height = current_height - 1;
            end
            turtle.digDown()
            turtle.down()
            break
        else
            turtle.up()
            current_height = current_height + 1;
        end
    end

    current_height = current_height - 1
end