Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:3/4
K:D
["dAfdaf d'2 D2 D2", 'e6 eAfAgf e2 A2 A2 eAfAgf e6']  
X:1
L:1/8
M:3/4
K:D
 dAfdaf | d'2 D2 D2 | dAfdaf | d'2 D2 D2 | ad'FaGb | EgFaDf | eAfAgA | ee'c'e'ac' | eaceAc | 
 eAfAgf | ecAEAc | e6 :: eAfAgf | e2 A2 A2 | eAfAgf | e6 | aF Adfa | bG Begb | c'A cfac' | 
 d'Bd'Gd'B | e'ce'Ae'c | f'df'Bf'd | e'ce'Ae'c | (3bc'd' (3gab (3efg | (3cde (3ABc (3def | 
 (3gfe (3fed (3edc | !fermata!d6 :|  