local quarryDepth = 2
local quarryWidth = 16
local quarryLength = 16

local function diglane()
  for length = 0, quarryLength do
        turtle.dig()
        turtle.forward()
    end
end

local function quarry()
    for depth = 0, quarryDepth do
        turtle.digDown()
        turtle.down()
        for width = 0, quarryWidth, 2 do
            diglane()
            turtle.turnRight()
            turtle.dig()
            turtle.forward()
            turtle.turnRight()