Craft a musical composition by incorporating the provided motif and the alphabetical representation of the given sequence.
X:1
L:1/8
Q:1/4=115
M:4/4
K:C
['', 'D2 EF G2 FE D2 EFEG', 'D2 CDEG GG/A/ GG CDEG FF/G/ C2', 'CD E2', 'CB,/A,/ G,C']  
X:1
L:1/8
Q:1/4=115
M:4/4
K:C
|: CDEE DC D2 :| EF G2 FE D2 | EFEG CE D2 |: CDEG GG/A/ GG | CDEG FF/G/ C2 ::[K:Eb] CD E2 ED/C/DD | 
 CD E2 ED/C/ D2 :: CD E2 E>D C2 | CB,/A,/ G,C CCDD | CDEE DCDD | CB,/A,/ G,C DB, C2 :|  