It's an attractive display, but I agree with the others that you have a volatile mix of clowns in that tank. They look pretty young at this point, which would probably account for why they seem to be getting along now.
But keep a very close eye on them, and have alternative housing lined up for all but one (your favorite, or the one who turns out to be hardest to catch, take your pick!), because I'm afraid that territorial aggression is inevitably going to rear its ugly head. On top of that, I think that since you only have one of each species, each one of your clowns--growing to maturity without other members of its own species to challenge it for dominance--will probably grow up to be a sexually mature female--and then the fireworks really begin, as they battle each other for control of the tank.
ETA: On closer observation, I just noticed that you seem to have a pair of tomato clowns...this makes keeping a close eye on your tank even more crucial. Tomato clownfish are infamous for being violently territorial as they reach sexual maturity and begin breeding. I hate to start out sounding critical, but I am genuinely concerned for the long-term well-being of your fish.