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:A
['BA Bc', 'BA Bc']  
X:1
L:1/8
M:3/4
K:A
 A2 e2 e2 | dc BA Bc | e2 BA Bc | E3 C EA | F3 E FG | A2 E2 e2 | d2 ec BA | Bc B4 | A2 AB ce | 
 ab ga fe | f2 af ec | e2 fe cA | F2 EF AB | cA de a2 | fe c2 BA |1 A6 :|2 A3 B ce |: f3 e fa | 
 fe c2 BA | B2 BA Bc | e3 c BA | F3 E FG | A2 E2 e2 | d2 ec BA | Bc B2 ce | f3 e g/a/b | a2 ba fe | 
 f2 af ec | e2 fe cA | F2 EF AB | cA de a2 | fe c2 BA |1 A3 B ce :|2 A6 ||  