vine turtle v0.1

local minFuel = 600
function checkFuel()
  if turtle.getFuelLevel() < minFuel then
    turtle.select(16)
    if turtle.compareDown() then
      while turtle.getFuelLevel() < minFuel do
        turtle.select(14)
        turtle.suckDown()
        turtle.refuel()
        if turtle.getFuelLevel() < minFuel then
          sleep(60)
        end
      end
    end
  end
end

function tryDump()
  turtle.select(16)
  if turtle.compareUp() then
    for i = 1,14 do
      if turtle.getItemCount(i) > 0 then
        turtle.select(i)
        while not turtle.dropUp() do
          sleep(30)
        end
      end
    end
  end
end

function isTurn()
  turtle.select(15)
  return turtle.compare()
end

while true do
  checkFuel()
  tryDump()
  if isTurn() then
    turtle.turnRight()
    sleep(5)
  end
  turtle.select(1)
  turtle.dig()
  turtle.forward()
end