its seem ur's project is related to control reverse and forward motor...
2 relay to control 1 motor is correct... and the input to trigger the relay u should connect it to the timer.
but first, e need understand the relay concept....how its been use, how its functioning....what type of relay that suitable...
its easy, because its just use the relay motor driver only....u can create it own, using livewire software (to do the simulation first of ur's circuit)....