Xuan Wu Quan (Xuan Wu Form) includes 53 movements. It is also called Two Symbol Form, which comes from Yin & Yang because the movements are both hard & soft, quick & slow.
When practicing this form the practitioner moves as quick as lightening & as loud as thunder. To maintain advantage this form uses stillness to overcome the movement of the opponent.
this in a instructional video of Wudang Xuan Wu Quan with English speak teaching.