Tree Line Farm

fromHome = 0
finished = false
term.clear()
term.setCursorPos(1,1)
print("Ready to commence simpole tree harvest!")
print()
print("Place wood blocks in Slot 1.")
print("Place saplings in Slot 16.")
print()
print("Press [ENTER] to begin.")
read(input)

-- Functions

local function fuel()
  if turtle.getFuelLevel() < 1000  then
    turtle.refuel(1)
  end
end

local function tMove(distance)
  fuel()
  for i=1,distance do
    while turtle.forward() == false do
      turtle.dig()
      turtle.attack()
      sleep(0.5)
    end
  end
end

local function tDescend(distance)
  for i=1,distance do
    while turtle.down() == false do
      turtle.digDown()
      turtle.attackDown()
      sleep(0.5)
    end
  end
end

local function tAscend(distance)
  for i=1,distance do
    while turtle.up() == false do
      turtle.digUp()
      turtle.attackUp()
      sleep(0.5)
    end
  end
end

local function turnaround()
  turtle.turnRight()
  turtle.turnRight()
end

-- Main Loop
while fromHome < 8 do
  tMove(2)
    height = 0
    turtle.select(1)
    tMove(1)
    while turtle.detectUp() == true do
      tAscend(1)
      height = height + 1
    end
    tDescend(height)
    turtle.digDown()
    turtle.select(16)
    turtle.placeDown()
    turtle.select(1)
    fromHome = fromHome + 1
  end
    turtle.turnRight()
    tMove(1)
    turtle.turnRight()
    tMove(3*fromHome)
    turtle.turnRight()
    tMove(1)
    turtle.turnRight()
for i=2,15 do
  turtle.select(i)
  turtle.dropDown()
end
turtle.select(1)