FFRend's binary distribution includes a simple demonstration project, called DemoBall.ffp. You'll find it in the same folder as the application (typically C:\Program Files\FFRend). DemoBall loads a Freeframe plugin (FFSrcPlug.dll, also included) which displays a bouncing ball. The plugin has a single parameter, the ball speed. This parameter is automated, using a ramp down waveform, so that the ball gradually slows down and then suddenly speeds up again.