If a pattern only has throws to even heights, then all the throws are fountain throws. This means that each hand has an independent pattern. As a result the hands can throw and catch at the same time. In synchronous patterns both hands throw together on one beat and they both catch together on the next beat.

A pattern where the hands can throw together is the four ball fountain, 4. To show that the pattern is synchronous, throws are written in pairs in brackets. The synchronous four ball fountain is written: (4,4). The first throw in each pair of brackets is always the right hand throw, and the second throw is always the left hand throw.