walk trot and canter on both reins, keep it simple, nothing bores judges more than individual shows which go on for ages! if your pony is good at it include a reinback, often you have to do a small jump, good luck and remember to enjoy yourself!!
Normally walk, trot and canter on each rein. I would walk away from the judge, trot a figure of 8, then canter a figure of 8. They usually like to see a "gallop" along the long side as well, behind the other horses. Trot at end of the long side, then maybe a trot to halt transition if you're happy doing them in front of the judge. They will get bored if there are a lot of long shows in the class.