Utilizing the provided musical theme and letter-based structure, compose a piece of music.
X:1
L:1/8
M:4/4
K:D
['DAFA DAFA defe dcBA eAfA', 'd2 cd eAAA fAAA gAfA eAAA eAfA']  
X:1
L:1/8
M:4/4
K:D
|: AF | DAFA DAFA | defe dcBA | eAfA gAfA | (3efe (3dcB AGFE | DAFA DAFA | defe dcBA | eAfA gfec | 
 d2 f2 d2 :: cd | eAAA fAAA | gAfA eAAA | eAfA gAfA | (3efe (3dcB (3ABA (3GFE | DAFA DAFA | 
 defe dcBA | eAfA gfec | d2 f2 d2 :|  