Tunnel3x3 (warning: the tunnel is almost infinite)

print() "Starting Tunnel..."

while turtle.getFuelLevel() ~=0 and turtle.getItemCount() ~=0 do
    turtle.dig()
    turtle.up()
    turtle.dig()
    turtle.up()
    turtle.dig()
    turtle.turnLeft()
    turtle.forward()
    turtle.turnRight()
    turtle.dig()
    turtle.down()
    turtle.dig()
    turtle.down()
    turtle.dig()
    turtle.turnRight()
    turtle.forward()
    turtle.forward()
    turtle.turnLeft()
    turtle.dig()
    turtle.up()
    turtle.dig()
    turtle.up()
    turtle.dig()
    turtle.turnLeft()
    turtle.forward()
    turtle.turnRight()
    turtle.down()
    turtle.down()
    turtle.forward()
end