Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
Q:3/8=100
M:6/8
K:F
['FAc cAF GBd dBG', 'afd bge']  
X:1
L:1/8
Q:3/8=100
M:6/8
K:F
 C | FAc cAF | GBd dBG | ABc def | bgf edc | FAc cAF | GBd dBG | Acf Bda | bge f2 :: z | afd bge | 
 afd cAF | afd bge | ecc c2 f | faf cAc | dBd cAF | GAB cdB | AFF F2 :|  