how to make a flamethrower in mc(not for combat only for fun because it has a short range)

1.build a dispenser line and fill it with flint and steel

2.at the end of the dispensers put a sign and lava then another sign again

3.at the other end of the line put a dispenser filled with arrows

4.put repeaters along side the dispenser line then connect it to a lever with redstone wires

THERE IT GOES FLARE IS ON YOUR HAND