Compose a musical piece using the specified sequence's alphabetical representation and the provided motif.
X:1
L:1/8
M:3/4
K:G
['ef g2 f2 g2 e4 f/e/d/c/ B4', 'G4 AB c2 c2 dc B4 cB']  
X:1
L:1/8
M:3/4
K:G
 ef | g2 f2 g2 | e4 f/e/d/c/ | B4 A2 | B2 d2 ef | e4 ef | g2 f2 g2 | e4 f/e/d/c/ | B4 Ac | 
 B2 E2 F2 | G4 :: AB | c2 c2 dc | B4 cB | A4 AG | A2 B2 d2 | e4 ef | g2 f2 g2 | e4 f/e/d/c/ | 
 B4 Ac | B2 E2 F2 | G4 :|  