granites

local currentSlot = 1

function checkSlot()
    if (turtle.getItemCount(currentSlot) == 0)
    then
        currentSlot = currentSlot + 1
        turtle.select(currentSlot)
    end
end

function graniteSaysDigForward(lengthToDig)
    local index = 0
    while (index < lengthToDig)
    do
        turtle.digDown()
        checkSlot()
        turtle.placeDown()
        turtle.forward()
        index = index + 1
    end
end

local index2 = 0
local lengthToDigX = 9
local lengthToDigY = 9
while (index2 < lengthToDigY)
do
  graniteSaysDigForward(lengthToDigX)
  if (index2 % 2 == 0)
  then
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
    turtle.forward()
  else
    turtle.turnLeft()
    turtle.forward()
    turtle.turnLeft()
    turtle.forward()
  end
  index2 = index2 + 1
end