Sir I want to make a thesis of water level indicator bye 555 timer ic

The connections and arrangements are made as shown in the figure above. The +9V is supplied to water using a metal contact. In this circuit all the transistors are working as a switch. When the water touches the metal contact in which base of each transistor is connected, a small current flows and turns on the transistor. When a transistor turns on, LED connected to it glows. Thus LEDs will be turned on depending up on the level of water. By using a relay we can also control the level of water.