Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
M:2/4
K:C
['c>BcG AF G2']  
X:1
L:1/8
M:2/4
K:C
 c>BcG | AF G2 | cGEC | D2 C2 | EDED | EF G2 | FEFG | A2 G2 | _BGAF | GE F2 | FGAB | c2 G2 | 
 c>BcG | AF G2 | CDEF | G2 C2 |]  