sanskrit

here is the transliterated sanskrit alphabet (to latin script).

The big symbol "H"

 it acts as a "table" for the letters to stand in, with vowels (a, i, u, e, o and semivowels y,r,l,v) at the bottom and consonants at the top (which by columns, स्थान (stana) — places of articulation, from left to right are ordered to be as going from the back of the mouth to the tip of the lips, with the square box marking the possibility of महाप्राण mahaapraana [added exhalation] . In Devanagari there is a horizontal top line called सूत्र (sutra) — the thread, symbol of the mind — present in every letter. it presents writing as the making of a garland, similarly the H here stands for the breathspan (in the shape of a mathematical segment, a line with two ends, to indicate the stoppings of breath कुम्भक (kumbhaka) and शून्यक (shunyaka)), after all, it is presenting or measuring the exhaling that carries all sounds. in this way the table is also the breath; and it presents or measures the exhalation which brings all the sounds of speech with it.

The spiral of metrics  सर्पिल

it is there as an aesthetic element and also because in sanskrit the metric length of vowels, as short  लघु (laghu) and long गुरु (guru) sounds, (similarly to how latin mora works), can get combined to fit into a specific poetic metering, so if you go seeing for each consequent meter length of poetic verse, how many combinations of short and long sound are possible, the pingala succesion arises. — known in the west as Fibonacci —  and otherwise known also as maatra meru (mountain of metric) (https://youtu.be/siFBqH-LaQQ explained by a mathematician). also spiral in sanskrit is सर्पिल (sarpila), the same word means serpent

The mantra runs the spiral ॐ

you can see the ॐ (aum̐) mantra moves through that spiral — from the bottom-up — for the A resonates in the navel, U in the chest, M in the neck.
from the spiral top-down would read as "shambhavaa" in which sham means twilight or junction and bhava means emotion, in sanskrit

the image shows a correspondance with the fingers of the hand, might want to call this kaara nyasa:  vowels can be mapped onto the palm, consonants on the finger phalanges (finger sections), with mahapraana on each joint, finally the sibilant letters are written uptop over the fingers, they stand up there as the three spokes of a त्रिशूल (trishula) — the trident.  
https://youtube.com/shorts/JsJZl5FYV8w  here is the nyasa (correspondence) in video format

Maatra and the 5 elements
also, what do you think of this relationship, about the length of speech and the elements:
laghu (short sound) - earth (annamayakosha),
guru (long) - water (manomayakosha),
pluta (longer) - fire (pranamayakosha),
swara (sustained, mental) - air (vijnanamayakosha),
and raga (melodious, varied) - akash (anandamayakosha)

and lastly,
what about the squiggly shapes?
what do you think devanagari squiggles stand for?(it could be like snakes crawling and mingling simbolically?)
since korean (hangul) shows the tongue placement for each sound (and even this diagram of latin script kinda does too if you look in certain characters like
K (tongue and palate meeting at the back of mouth),
B with two lips that are used to sound it,
T with the tongue reaching for the roof of the mouth,
O with the rounded lips,...
maybe devanagari shows where in the body each letter resonates?

and lastliest,

the soft spot of the skull ब्रह्मरन्ध्र

I heard someone say that in the womb, life enters the body through the ब्रह्मरन्ध्र brahmarandra, the soft spot at the top of the head of a baby where the skull is not yet formed, and that it also exits through there at the end of a life, so, saying Shambhavaa (indicating the sound going downwards) <or simpler, the sound "maa", without the sibilant (sha), mahapraana (bha) and vowel (va/ua)> to simbolise the life entering in the body, from silence to sound, and then saying aum̐, to present the same praana as exiting the body by it going upwards in the resonation through the body;

then the two together are shambhavām̐ (shambhavaa+aum)

and then if you map these two in the right and left side (as this graph shows the right hand) it can be further simbolised by अनुलोम विलोम (anuloma viloma): inhale through left nostril, exhale through right. in hatha yoga the left half of the body is lunar and the right is solar. 

what if one says aloud shambhavā (downwards motion) and simultaneously mentally reciting aum̐ (upwards motion); are these motions the naturally present qualities of each both body and mind?
or maybe this too can be expressed in the duality of question and answer. "shambhavā? aum̐." 

or if one mentally recites shambhavaa while inhaling and loudly say aum while exhale, thats another way it can go.

maybe its beautiful to join the hands together in namaste after seeing this :)

also the sanskrit language is repleted of chest originating exhalation sound (Ha, or Ahh sound, like a sigh of relief) to the point that there is a rule in the grammar that states that whenever the Ha sound comes before a nasal sound it should be uttered after it instead, the aim of this is to produce a chest originating sound that relaxes the speech, instead of a neck constricting one. so the whole of the speech is relaxed always!