Link the Wood Chopper

local WaitTime = 60
local WentUp = 0

-- Detect
local function Detect()
  if turtle.detect() then
    print("Tree!")
    return true
  else
    print("Not Tree!")
    return false
  end
end --Detect()

-- ChopUp
local function ChopUp(Count)
  if turtle.digUp() then
    if Count then
      WentUp = WentUp + 1
      print("Up: " .. WentUp)
    end
    return true
  else
    return false
  end
end --ChopUp()

-- ChopDown
local function ChopDown(Count)
  if Count then
    if WentUp > 0 then
      turtle.digDown()
      WentUp = WentUp - 1
      print("Down: " .. WentUp)
      return true
    else
      return false
    end
  else
    turtle.digDown()
    return true
  end
end --ChopDown()

-- ChopForward
local function ChopForward()
  if turtle.dig() then
    print("Forward")
    return true
  else
    return false
  end
end -- ChopForward()

-- Main Loop
while true do
  local Detected = false

  Detected = Detect()
  if Detected then
    ChopForward()
    turtle.forward()

    --Clear Stump
    ChopDown(false)

    local StillWood
    StillWood = true
    while StillWood do
      StillWood = ChopUp(true)
      if StillWood then
	    turtle.up()
      end
    end --StillWood (up)

    ChopForward()
    turtle.forward()

    StillWood = true
    while StillWood do
      StillWood = ChopDown(true)
      turtle.down()
    end --StillWood (down)

    -- Clear Stump
    ChopDown(false)

    -- WentUp = 0

    turtle.turnRight()
    ChopForward()
    turtle.forward()

    -- Clear Stump
    ChopDown(false)

    StillWood = true
    while StillWood do
      StillWood = ChopUp(true)
      if StillWood then
	turtle.up()
      end
    end

    turtle.turnRight()
    ChopForward()
    turtle.forward()

    StillWood = true
    while StillWood do
      StillWood = ChopDown(true)
      turtle.down()
    end

    -- Clear Stump
    ChopDown(false)

    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
    turtle.back()

    print("Done")
  end --Detected

  -- Refuel
  if turtle.getFuelLevel() < 10000 then
    for Slot=1,16 do
      local NumberOfItems = turtle.getItemCount(Slot)
      turtle.refuel(NumberOfItems)
    end --for
  end --if

  -- Store
  for Slot=1,16 do
    turtle.select(Slot)
	turtle.dropDown()
  end

  redstone.setOutput("bottom", true)
  sleep(10)
  redstone.setOutput("bottom", false)
  sleep(WaitTime)
end