Quick Cutter

local count = 0
while true do
  turtle.select(1)
  if turtle.getItemCount(1) > 0 then
    turtle.place()
  else
    print("Out of Saplings")
    break
  end
  turtle.select(2)
  if turtle.getItemCount(2) > 0 then
    turtle.place()
  else
    print("Out of Bonemeal")
    break
  end
  turtle.select(1)
  turtle.dig()
  turtle.forward()
  local height = 0
  while turtle.detectUp() do
    turtle.digUp()
    turtle.up()
    height = height + 1
  end
  repeat
    turtle.down()
    height = height - 1
  until height == 0
  turtle.back()
  count = count + 1
  print("Cut down "..count.." trees")
end