Craft a musical composition by incorporating the provided motif and the alphabetical representation of the given sequence.
X:1
L:1/8
M:4/4
K:D
['A G E D C']  
X:1
L:1/8
M:4/4
K:D
 d4 | D D E F | (G A) B A | G E D C | D z z A | d d B d | (c A) B G | F G A B | [Ac]3 A | d d B d | 
 c A B G | D d c B | A2 F3/2 E/ | D D E F | G B A A | G E D C | D4 |"^ch" d3 d | D D E F | 
 G B A A | G E D C | D4 |]  