Construct a musical work that combines the specified alphabet-based pattern with the given melodic theme.
X:1
L:1/8
M:2/4
K:F
['cAFA c2', 'Acfc Acfa']  
X:1
L:1/8
M:2/4
K:F
 AB | cAFA | c2 f2 | c2 a2 | edc=B | cAFA | c2 fd | cBAG | F z :: cB | Acfc | Acfa | gfed | cBAB | 
 Acfc | Acfa | gdBd | e z :|  