Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:4/4
K:D
['eB B2 B2', 'fede f2 df gfgb afdf fefa bf']  
X:1
L:1/8
M:4/4
K:D
|: A3 B AF F2 | dcdf eBdB | (3ABA FA dcdf | eB B2 B2 dB | A3 B AF F2 | d3 f eBdB | (3ABA FA dcdf |1 
 eB B2 B2 dB :|2 eB B2 B2 de |: f2 df g2 eg | fedf fede | f2 df gfgb | afdf fefa | bf f2 afef | 
 d2 ed BAFB | (3ABA FA dcdf |1 eB B2 B2 de :|  