Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:3/4
K:C
['ce c2']  
X:1
L:1/8
M:3/4
K:C
 Bd f2 a2 | ge c2 eg | Bd f2 a2 | ge c2 ec | Bd B2 dB | ce c2 ec | Bd B2 dB | ce c2 G2 | B2 d3 B | 
 ce c2 ec | Bd B2 dB | ce c2 G2 |]  