Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
Q:1/8=160
M:4/4
K:C
['ecA A>BA', 'Aaa aea', 'Aaa efg']  
X:1
L:1/8
Q:1/8=160
M:4/4
K:C
[M:6/8][K:D] Tee be a a A da"^A modal" .a/f/ | ecA A>BA | cBA Aaf | ecA A>BA | dBG GBd | 
"^5" cBA A>BA | ecA Ace | fed edc | dBG A2 :| c/B/ |"^9" Aaa aea | cBA A>BA | Ggf gfg | dBG GcB | 
"^13" Aaa aea | fga ef=g | fed edc | dBG A2 :| d/B/ |"^17" Aaa e2 a | cBA AcB | Aaa efg | dBG GcB | 
"^21" Aaa efg | fga efg | fed edc | dBG A2 :|  