Utilize the alphabetic system of the specified musical pattern and the supplied melodic theme to create a piece of music.
X:1
L:1/8
M:4/4
K:F
['a2 g3 f e2 d2 cdcB A2', 'Accc dccc Acfc acfc']  
X:1
L:1/8
M:4/4
K:F
|: a2 | g3 f e2 d2 | cdcB A2 GF | ECEG c2 cB | AFAc f2 a2 | g3 f e2 d2 | cdcB A2 GF | EFGA Bcde | 
 f2 a2 f2 :: cB | Accc dccc | Acfc acfc | Accc dccc | Acfc acfc | =Bccc dccc | =Bcec gc_bc | 
 =Bcec gc_bc | acgc f2 :|  