Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/8
M:3/4
K:G
['GA B3 A B2 c2 e2 dc', 'B2 f2 c2 c2 e2 d3 e']  
X:1
L:1/8
M:3/4
K:G
 GA | B3 A B2 | c2 e2 dc | B2 d2 GA | B4 de | d2 c2 B2 | cA E2 F2 |1 G3 AGE | D4 GA :|2 G3 ABA | 
 G4 |: ef | g2 B2 B2 | f2 c2 c2 | e2 d3 e | d4 de | d2 c2 B2 | cA E2 F2 |1 G3 AGE | D4 ef :|2 
 G3 ABA | G4 |]  