Words and sentences are auditory forms, which can inform us about creation, maintenance and dissolution. Similarly, a highly coded visual communication form exists consisting of geometrical diagrams called Yantras. The Śrī Yantra or Śrī Cakra is the genetic code of the cosmos, of the individual and of the microcosm. It is a symbol of all creation. – Śrī Amritānananda Natha Sarasvatī

Gaṇeśa-graha-nakṣatra-yoginī-rāśi-rūpiṇīm |

Devīm mantra-mayīm naumi mātṛkaṁ pīṭha rūpiṇīm ||

I bow down to that Supreme Devī who is the embodiment of the cosmic awareness as the gaṇeśas, planets, stars and constellations, yoginīs, signs of the zodiac, mantras, the matrix of language, and sacred sites.

Nityā Śodaṣikārṇava 1:1

The Śrī Yantra or Śrī Cakra consists of nine āvaraṇas or enclosures, which are the nine veils. Below is a set of illustrations of the Yoginī-s(powers of Devī) of each āvaraṇa. For more detailed description and understanding of this please refer to the book Gifts from the Goddess, selected works of Śrī Amritānananda Natha Sarasvatī by Michael Bowden and Śrī Cakra Pūja Vidhiḥ by Śrī Chaitanyānananda Natha Sarasvatī.