First of all, both sides are the starts AND the ends. Left starts and right ends and v/v. They go round and round to the center, then round and round away from the center. 1 bloon represents a differetn track. For example, there is 2 bloons. 1 bloon goes from l to r, then the other is r to l. If there's many, it's still the same. 50/50.