Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
M:3/4
K:C
['GBG c2 E2 FD C3 c BA', 'G3 Gcd e2 d2 cE G3 E']  
X:1
L:1/8
M:3/4
K:C
 GBG | c2 E2 FD | C3 c BA | d2 G2 A^F | G3 || Gcd | e2 d2 cE | G3 E FG | A2 G2 FD | C3 ||  