Steve is pulling your leg. Of course the diagram is not simple. You left out almost all information one needs to help:
- what is your operating voltage?
- what is your input signal (trigger to start timing)?
- what length of delay do you need?
- what is your output signal?
Very generally: what are you trying to do? We need to understand your requirements to give you any useful tips. A delay circuit can range from a simple RC circuit to a complete microcontroller including software...
@steve: I very much like that diagram