
There are only 6 letters of the 26-letter alphabet that can be made from 3-strokes each in the form of one of the triangles (closed or open) of the ArcheTet. These are the 4 letters of D A N U, plus S and Z (S- and Z- are the only 2 general types of spiral 'cobra-coils', the 6 right-hand Z-coils which spiral upward clockwise, and the 6 left-hand Sinistr-S-coils, which spiral upward counterclockwise). Since the N of the name DANU is the same as a tilted-Z, we can omit the Z and substitute the only decimal number, 4, which can be found as an open triangle on the ArcheTet. Thus, that leaves us solely with DANU'S-4 as the only possible 6 such obtained alphanumeric symbols!
D and N are each associated with NIGREdo and ALBEdo; A and U are associated with RUBEdo and AUREdo; ie:
D: Dark-fluid Soul Pleasure Emoters following the Dark-Goddess Persephone (Proserpina) from the South, bringer of the Eleusian Mysteries;
A: fiery Mind Possession Mentors following the flushed-faced Warrior-Goddess Pallas Athena (Minerva), the Parthenos Virgin who Inspired the Parthenon, from the setting sun of the West, establisher and protector of the technical arts and centers of civilization (Atheneum), inventor of the flute as a musical tool for making sound-waves through the air by direct means of the breath, and the Goddess of Weaving, as Arachne discovered when she was changed to a Web-weaving spider for having challenged Athena, whose totemic bird was the Owl that could cut through the air silently like a knife (Athane) while cutting and thinning the excess rodent population;
N: martial-based mind-spiral of earthy Physical Sense-Maker Fixer-Taker Perceiver Pale-faces from the North, bringing the timely Saturnian crafty technologies (with Haephestus) to the south;
and U: venusian-based mind-spiral of volatile Volitional Spirit Power Acting Will-Doers, yellow-gold URANasian AUra probers from the EAst, bringing the aethereal earthiness (with Gaea) to the west ('gold' and 'yellow' both stem from the same root 'yeold', and Yellow is the spectral color between Green and Orange-amber, as in the URanasian aPole of the ArcheTet). UR: Uraeus, the sacred asp on royal headress, from Egyptian word for cobra; >Gr ouraios: of the tail. Urania: the muse of astronomy; or Aphrodite as representing spiritual love; Uranic: celestial, astronomical; Urano-: pertaining to heavens; Uranus: son and mate of Gaea, father of titans, including his youngest Cronos, who dethroned him. Anu: Akkadian god of heaven, counterpart of Sumerian AN. Anubis: Egyptian god of tombs with the head of a jackal; weigher of the hearts of the dead against the feather of truth. Anus >L: ring. A torus.

Note that the 4 and U each have 4 positions corresponding to 4 different 3-yangline/3yinline balanced Hexagrams; the N and S each have 2 positions. Thus, all 12 yang/yin 'balanced' Hexagrams are exactly correlate with the 12 possible open-triangle spiral cobra-coils of the ArcheTet (6 sinistral, 6 dextral).
The D and A closed triangle window-Face Holes each have opposite-pointing closed triangle window-Face Holes (Gaea and Haephestus), and there are 4 Vertex-Poles (Cronos, URanus, Poseidon, Hades) opposite each of the 4 window-Face Holes. This accounts for the 4+4=8 remaining yin/yang 'balanced' hexagrams out of the total possible 20: (4Vs+4Fs) + 2Z +4U + 2S +4; ie: D(4) A(4) N(2) U(4) S(2) 4(4)!
Also note that the 4 Poles have their corresponding top and bottom trigrams in their 'correct' places of the hexagram (a corresponding yang-tri in the place of the lower trigram; a corresponding Yin-trigram in the place of the upper trigram). They all represent the outer planets and primary mythic gods (3 yang-structures, 1 Yin-structure).
Accordingly, all 4 Holes, have their same corresponding trigrams but now reversed, ie: swapping position in upper and lower places; these Holes have their trigrams in 'incorrect' places. They represent secondary god/dess mates of the Poles (1 yang, 3 Yin structures).
The distribution of 6 colors among the 12 letter-strokes of DANU, considering their significance, is interesting.
There are 2 strokes of each of the secondary colors (Purple Orange Green) associated with Primary stable structures Tet, Octa, Icosa; and there is 1 Red, 1 Blue and 4 Yellow strokes, all 3 primary colors associated with unstable structures. The Moon (Cuboc) is smallest; Jupiter (I-Do) and Sol (Do) are the largest of the Solar System's corresponding bodies. The Sun's Yellow is in all 4 letters.
The 'D' has all 3 Yin 5-symmetry structures (Green Icosa, Yellow Do, Blue I-Do), and as a wHole this triangular window-Face represents Persephone, the most feminine of the signs, and the spaces beyond the Solar System, leading out to the Galaxy.
The letters A N U each have colors associated with the Yang 3,4sym structures (Red Cuboc, Orange Octa, Purple Tet).

Each of the closed-triangle window-Face Holes D A implies an opposite Vertex-Pole mate (which has its same upper/lower trigrams, but swapped).
Each of the letters N U is an open-triangle or 'cobra-coil', each one of which alone implies its coupling partner (a complementary opposite Hexagram); together, the two partners (in each pair) complete the formation of another Tet (there are thus 6 Tets that together form a 6-Tet helical chain called a HeliTet).
D is the 4th letter of the Greek alphabet (akin to Hebrew Daleth: Door), &Delta , a triangle-symbol used in math to indicate infinitessimal change in calculus equations; in Astronomy, it indicates the 4th brightest star of a constellation such as the Southern Cross.
A is the 1st letter Alpha (or :Aleph: ox), the brightest star in a constellation, such as Centaurus; Alpha Centauri is the 1st magnitude star closest to our Sun.
N is Nu, the 13th letter (Heb nun); and U is Upsilon, the 20th (Heb: Qoph).
Each of the four tri-stroke letters DANU's-4 = DNA's-4U, ie: D A N U, refers to a particular I Ching Hexagram, as follows:
D (70,Wen12) = Abducted Persephone: Parting Disjunctive conflict, LOOSEN Binding Lying Fallow, Recuperate is The Lesson of wHole Persephone. Part of receiving is releasing ties, dissolution, Spontaneously Creative; PART THE WATERS within the Way, not from the Way.
Light departs
In going dark;
Earth and Heaven
Leave their mark.
Structures: YinTrap; RDo over Cube
[Her reverse mate is the fPole of Adductive Hades: Melding, Alloy opposites 07, Wen11, Conjunctive-union; Peace Underworld ].
Dark departs
In coming light;
Heaven and Earth
Do each unite.
Structures: negeTet; Cube over RDo
A (43,41Wen) = Reducing Athena: Cut-down; deductive/seductive; Head-over-Heart; Gather LESS Tightly, Love Might Less is The Lesson of pink aHole Athena. Part of gathering in, is giving out; Love evanescence, and Ephemeralize! ; Decrease amassing; The Lake within LESSENS the heavy solidity of the Mountain; ie THIN out, CUT waste and overhead.
Structures: R-IDo; T-over-Ic
[Her reverse mate is the dark wPole of Inducing Poseidon: Influencing Wooing 34,Wen31; seductive/deductive; Heart-over-Head; Leading-In].
Structures: RTriacon; Ic-over-T
N (46,18Wen) = Gently FIXING, Renew Recuperate, Revitalize, Review, Re-cycle 'rejected wastes' and Conserve; ie: FIX is the Lesson here, 'yang-push thinking of mars-mercury/sun'. Resolve Repair, Stabilize and Fix, Grow Firm, by penetrating like the wind, breathing 'beneath' the 'immoveable' Mountain, Inspire Brightness.
Structures: T-over-Ido
[The complement is 31,Wen17, Following NEX: Nexus, Annex, Next, Sudden Bounty, 'Yin-pulling together feeling of jupiter-moon/venus'].
Structures: Ic-over-Oc
U (54,56Wen) = Keep-Light, wend, wanderlust;, Roam, Run, GO) is the Lesson here
Structures: Do-over-T
[Its complementary opposite 23,Wen60, is Stop, Top, END; Limitation, 'desire running-out'] ('limnetic: >G limne, on open water, marsh or lake).
Structures: Cuboc-over-Ic
NU; earthily FIX; fierily ROAM.
DA; fluidly PART; airily CUT
Song 4U
When the man shall leave his mother
the woman shall leave her home;
Each will find an Other
as they begin to roam
When you reach the limit
of what is left for you,
Abundance may, perchance you'll find,
allot what's right for you...
(allot: apportion, spread-, mete-, deal-, or share- out, disperse, distribute, dispense)
Note:
'Limited' and 'roaming' are the complementary-opposite hexs for the left-hand '4U';
'Dispersing' and 'abundance' are complementary-opposite hexs for the right-hand '4U'.
Thus, the 2 pairs-of-opposites, 'roaming-limitation' and 'abundance-dispersed', are enantiomorphs of each other!
UNCOVER THE MOTHER, AND DISCOVER THE OTHER!
Structural Symbols Of DA NU
D Silent Spherical Earth Cube within La Heaven's diamond-faceted R-Do
A Liquid IcoSea Mi within Tet plasm
N So Fluid I-Do Sky within Mt. Tet
U Ti Fiery Tet pyramid with spheric Sun-Do above (like The StarGate symbol)
The complementary Reversal (for DA) and Opposite (for NU) keywords are:
Meld Lead Nex Limit.


Hexagram Solar 4-Vertex Sequence (See Tet-Myths):
N Re-Nu White earth CroNosaturN Physical Matter Maker-Fixers from North Outerworld
U Ruddy Roving fire Mental Manipulaters from the West (PLUTO Underworld)
D BluGreen and BluBlack Dark Parting water Soul Emoters from the South Innerworld
A Yellow Air Volitional Ephemeral Spirit Movers from East (URANUS Overworld)
N
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Digram Lunar 4-Vortex Sequence (See Cosmos/Chaos News):
D Old Yin 4th quarter to New-moon (White Winter zenith midnite)
A Young Yang 1st quarter to waxing half-moon (Ruddy Dawn Spring Rising)
N Old Yang 2nd quarter to Full moon (Summer Nigredo Nadir Noon)
U Young Yin 3rd quarter to waning halfmoon (Dusk AUredo AUtumn Twilight)