dig

function dig3()
  repeat turtle.dig()
  until turtle.forward() == true
  turtle.digDown()
  while turtle.digUp() == true do
    sleep(0.4)
  end
end

print("place turtle on last torch, facing forward")
print("put torches in slot 1, chests in slot 2 and press a button")
print(turtle.getFuelLevel())
read()
turtle.turnLeft()
for j = 1, turtle.getItemCount(1) do
  turtle.select(1)
  turtle.placeDown()
  dig3()
  for i = 1, 5 do
    if turtle.getItemCount(16) > 0 then
      turtle.select(2)
      turtle.placeDown()
      for k = 3, 16 do
        turtle.select(k)
        turtle.dropDown()
      end
      turtle.select(1)
    end
    if i % 2 == 1 then
      turtle.turnRight()
      dig3()
      turtle.turnRight()
      dig3()
      dig3()
    else
      turtle.turnLeft()
      dig3()
      turtle.turnLeft()
      dig3()
      dig3()
    end
  end
  turtle.turnLeft()
  dig3()
  turtle.forward()
  turtle.turnLeft()
  dig3()
end
turtle.select(1)
turtle.placeDown()
dig3()
turtle.back()
turtle.turnRight()