Q1 will already be on having been set by another part of the program. I want to use a single pulsed I/P (from a momentary push button) to switch on Q2 and switch off Q1, then with a second pulse, switch on Q3 and switch off Q2, a third pulse to switch Q1 back on and Q3 off. Subsequnet pulses to continue to cycle through Q1,Q2 and Q3. I've messed around with counter and impulse relays but can't get it to work. Can someone brighter than me help please?