Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:2/4
K:C
['rather F E>CEF GEGA c>Bce G2 EG', 'A3 c G>EGA cd eg fede g2']  
X:1
L:1/8
M:2/4
K:C
"^Mod.: rather slow." F | E>CEF | GEGA | c>Bce | G2 EG | A2 ed | cGED | C>EAG | A3 || c | G>EGA | 
 cd eg | fede | g2 e>d | cAGE | DEA>G | ECC>D | C3 ||  