Im sure many of u must've played the nerve testing game(dont know its exact name)..its where there's this long twisted wire, and the aim is to take a ring through which this wire is passed from one end to the other..if it touches the wire, a light or buzzer sounds, and u lose...i've been given the task of building one...i was thinkin of having a system where intially a green LED is lit..then using and SPDT relay, if and when the competitor touches the wire with the ring, the relay is activated and the green LED goes out and the red LED lights up...but i like to know how the circuit can b made so tht the red LED is lit until the circuit is reset..i hav submitted a rough schematic diagram also..pls pls help me cos i hav to make it by tmrw!!!tht is i got only 1 day!!!!