Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:4/4
K:C
['(3(FED) FA A2 BcBA FAAB dedB', '(af)df gefd edBc dedB', 'abaf gfed']  
X:1
L:1/8
M:4/4
K:C
 BEA |[M:2/2][K:D]SOSOO .!fermata!PMTuCO MD2 (3(FED) FA A2 | BcBA FAAB | dedB ABde | fede Tf2 e2 | 
 D2 (3(FED) FA A2 | BcBA FAAB | dedB ABdB | AFDF TE2 D2 || faab (af)df | gefd edBc | dedB ABde | 
 fede Tf2 e2 | (fa)ab (af)df | gefd edBc | dedB ABdB | AFDF TE2 D2 || defg abaf | gfed cAAG | 
 FAdB cdeg | fdgf e2 AA | (de)fg abaf | gfed cAAc | defd ecdB | AFGE D2 z2 |]  