Tree farm

if turtle.getFuelLevel() < 100 then
  turtle.select(1)
  turtle.refuel(1)
end

shell.run("goto",388,66,458)
shell.run("goto",387,66,458)
turtle.forward()
while true do
  search()
end

local function search()
  if turtle.getFuelLevel() < 100 then
    turtle.refuel(5)
  end
  turtle.select(3)
  if turtle.compareDown() == true then
    cut()
    turtle.forward()
    do return end
  end
  turtle.select(2)
  if turtle.compareDown() == true then
  turtle.turnLeft()
  turtle.forward()
  do return end
  end
  turtle.select(4)
  if turtle.compareDown() == true then
  store()
  turtle.forward()
  do return end
  end
  if not turtle.compareDown() then
    turtle.forward()
  end
end

local function cut()
  turtle.turnLeft()
  if turtle.getItemCount(5) < 9 then
    turtle.select(6)
  else
    turtle.select(5)
  end
  if turtle.detect() == true then
    for I = 1,7 do
      turtle.place()
    end
  end
  while turtle.detect() == true do
    turtle.dig()
    turtle.up()
  end
  turtle.select(3)
  while turtle.down() == true do
    turtle.down()
  end
  turtle.select(7)
  turtle.place()
  turtle.turnRight()
end

local function store()
  turtle.turnRight()
  turtle.forward()
  turtle.forward()
  for I = 8,16 do
    turtle.select(i)
    turtle.drop()
  end
  turtle.select(1)
  turtle.suckUp()
  turtle.select(5)
  turtle.suckDown()
  turtle.select(6)
  turtle.suckDown()
  turtle.back()
  turtle.select(7)
  turtle.suckDown()
  turtle.back()
  turtle.turnLeft()
  do return end
end