simpleTunnel

local tArgs = {...}
local len =tonumber( tArgs[1] )

turtle.up()
while len > 0 do
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.digDown()
    turtle.turnLeft()
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.digDown()
    turtle.back()
    turtle.turnRight()
    turtle.turnRight()
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.digDown()
    turtle.back()
    turtle.turnLeft()
    turtle.up()
    turtle.digUp()
    turtle.up()
    turtle.digUp()
    turtle.up()
    turtle.digUp()
    turtle.turnLeft()
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.digDown()
    turtle.back()
    turtle.turnRight()
    turtle.turnRight()
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.digDown()
    turtle.back()
    turtle.turnLeft()
    turtle.down()
    turtle.down()
    turtle.down()
    len=len-1
end