-- sTunnel
-- v1.0.5 
-- By Master Hellish https://www.youtube.com/c/MasterHellish
-- & Biffyn https://www.youtube.com/BiffynGaming

-- 9 wide 5 high tunnle.
-- Refuling. No Full Handling. Keeps going infinitely

-- Functions
function tForward()
  while not turtle.forward() do
    turtle.dig()
    sleep(0.1)
  end
end

function tUp()
  while not turtle.up() do
    turtle.digUp()
    sleep(0.1)
  end
end

function tStrip()
  for i = 1, 8 do
    turtle.digDown()
    turtle.digUp()
    tForward()
  end
  turtle.digUp()
  turtle.digDown()
end

function reFuel ()
  fuel = turtle.getFuelLevel()
  while fuel < 100 do
    turtle.refuel(1)
    fuel = turtle.getFuelLevel()
  end
end

-- Main
term.clear()
term.setCursorPos(1,1)
term.write("Place turtle in bottom left of tunnel")
term.setCursorPos(1,2)
term.write("Fule in slot 1. Press Enter to start")
r = read()
reFuel()
tUp()
while true do
  reFuel()
  tForward()
  turtle.turnRight()
  tStrip()
  turtle.turnLeft()
  tForward()
  turtle.turnLeft()
  tStrip()
  turtle.turnLeft()
  tForward()
  turtle.turnLeft()
  tUp()
  turtle.digUp()
  tUp()
  tStrip()
  turtle.turnLeft()
  tForward()
  turtle.turnLeft()
  tStrip()
  turtle.digDown()
  turtle.down()
  turtle.digDown()
  turtle.down()
  turtle.turnRight()
end