dig

--This simple script will dig a line


for i=1,16 do
  local count = 0
  local fail = 0
  while turtle.digDown() or fail <= 10 do
    f = turtle.down()
    if f == true then
      count = count + 1
      fail = 0
    else
      fail = fail + 1
    end
  end
  for j=1,count do
    turtle.up()
  end
  turtle.digUp()
  turtle.placeUp()
  for k=1,16 do
    turtle.select(k)
    turtle.dropUp(64)
  end
  turtle.digUp()
  while turtle.dig() do end
  turtle.forward()
end