Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/4
M:3/2
K:F
['A2 B2']  
X:1
L:1/4
M:3/2
K:F
 F2 | F4 A2 | c4 d2 | c2 A2 B2 | c4 f2 | e2 d2 e2 | f4 c2 | c4 B2 | A4 F2 | G2 A2 B2 | A2 G2 F2 | 
 E2 D2 E2 | F4 |]  