This animation uses a Cycle to create a continous animation of dots appearing from the left and moving to the right.
Waveform="Sawtooth" on the Cycle is the basic way to get a repeating cycle. This waveform plays from progress=0 through to 1 and then wraps to 0 again (unlike the default sine waveform than goes back and forth smoothly).
The Dot.TimeOffset is set as the Cycle.ProgressOffset to stagger each of the dots. Note that this is only appropriate for triggers that are always on while visible to the user (such as WhileVisible). By overriding the default ProgressOffset we prevent Cycle from reverting smoothly to a rest state, which happens when triggers are deactivated. This would create a visible jerk/jump in the animation.