Compose a musical piece using the designated musical pattern's alphabetic representation and the assigned melodic theme.
X:1
L:1/8
M:2/2
K:F
['AB cAGF dBAG cbge faAB cAGF G=Bdf', 'c2 AB cegb ceac Bdgf fedc dBAc']  
X:1
L:1/8
M:2/2
K:F
 AB | cAGF dBAG | cbge faAB | cAGF G=Bdf | ecd=B c2 :: AB | cegb ceac | Bdgf fedc | dBAc | Begb | 
 agfe f2 :|  