Compose a musical piece using the specified sequence's alphabetical representation and the provided motif.
X:1
L:1/8
M:2/2
K:F
['af gc de', 'cB Ac']  
X:1
L:1/8
M:2/2
K:F
 c2 | cf af gc de | fe gf af ga | bg af gd bg | gf ed cB AB | cf af gc de | fc af gc de | 
 fe fd cB AG | F2 A2 F2 :: cB | Ac fe dc BA | BG gf ed cB | Ac ag fe dc | cB AB G2 cB | 
 Ac fe dB gf | ec ag fe dc | df ed cB AG | F2 A2 F2 :|  