Slow your breath and inhale and exhale with the circle's movement, giving yourself a moment to rest. Relax, there is no correct rhythm to follow here. Let the gentle motion guide your breath, rather than control it. If it helps, choose a white noise — rain, ocean, or wind — and allow it to softly draw your attention as you breathe.
Breathe with the circle — inhale as it expands, exhale as it contracts. Try to take it slow.
(If the circle hasn't appeared yet, please be patient — it will arrive shortly.)