function baumWeg()
  b, item = turtle.inspect()
  if b and item.name == "minecraft:log" then
    turtle.dig()
    turtle.forward()
    upCnt = 0
    while true do
      b, item = turtle.inspectUp()
      if b and item.name == "minecraft:log" then
        upCnt = upCnt +1
        turtle.digUp()
        turtle.up()
      else
        break
      end
    end
    while upCnt > 0 do
      upCnt = upCnt -1
      turtle.down()
    end
  end
end

function findSampling()
  for i=1,16 do
    turtle.select(i)
    item = turtle.getItemDetail(i)
    if item item.name == "minecraft:sapling" then
      return i
    end
  end
  return false
end

function main()
  while true do
    b, item = turtle.inspect()
    if b and item.name == "minecraft:log" then
      break
    else
      turtle.forward()
    end
  end
  baumWeg()
  turtle.forward()
  turtle.turnLeft()
  turtle.turnLeft()
  findSampling()
  turtle.place()
  turtle.turnLeft()
  turtle.turnLeft()
end