GpsApi

--excavate--
os.loadAPI("gps")
mx = 0
my = 0
mz = 0
function dig()
  while turtle.detect() do
    turtle.dig()
  end
  turtle.forward()
end

function excavate(x,z)
  for i = 1, z do
      for o = 2, x do
        dig()
      end
      if gps.GetOri() == 1 and i ~= z then
        gps.Rotate(2)
        dig()
        gps.Rotate(3)
      elseif gps.GetOri() == 3 and i ~= z then
        gps.Rotate(2)
        dig()
        gps.Rotate(1)
      end
  end
end