Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
M:4/4
K:C
['FED cBA dcd efg fed cAG', 'dfa dfa']  
X:1
L:1/8
M:4/4
K:C
 BEA Dec |[M:6/8][K:D]SOSOO .!fermata!PMTCOMG | FED cBA | dcd efg | fed cAG | FAF GFE | FED cBA | 
 dcd efg | fed cAG | ABc d2 :: A | dfa dfa | dfa afd | =cegceg | =ceggfe | fdf gfe | agf bag | 
 fed cAG | ABc d2 :|  