Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/16
M:2/4
K:F
['B G']  
X:1
L:1/16
M:2/4
K:F
 c2 c2 B2 c2 | f3 d B2 G2 | c2 d f B2 B G | G B A2 G4 | G2 G2 F2 G2 | c f d c B c G2 | 
 c2 d f B2 B G | G F E2 F4 | G B G F G2 z2 | c4 E4 | G2 G B G F E2 | C2 B,2 C4 |]  