water Level detector

here in this, i use 5 (BC 337 NPN tansistors) 5 (LEDs) and 5 (330 ohm resistor). i use switches as different level of water. form switch 2 to switch 5 i use them as different levels of water. and switch 1 as indicator when then water reaches as level 1 (basically switch 1) so the buzzer in the Circuit start ringing. so this all this circuit. For more info: https://www.youtube.com/watch?v=TdV-I6ofkKw Thanks