Toyota Repair: Oil leak 1993 Camry, toyota camry, perfect rectangle

Question
I just bought a 1993 Toyota Camry and after driving I noticed four spots of oil in my driveway (possibly below motor) The four spots are almost a perfect rectangle where the drops are. Any ideas??? Thanks so much!

Answer
There are quite a few places for the oil to leak, the most common are valve cover gaskets, distributor 0-ring seal, crankshaft and camshaft seals, the oil pan, rear engine main seal.
Is is a 4 cylinder or V-6 engine, are the oil drops more to the left or right side of the car.