Compose a musical piece using the specified sequence's alphabetical representation and the provided motif.
X:1
L:1/8
M:4/4
K:D
['dcAG EFGE A2 EA cdec dcAB', 'Ad d2']  
X:1
L:1/8
M:4/4
K:D
|: dcAG EFGE | A2 EA cdec | dcAB cdef | g2 fe dfec | dcAG EFGE | A2 EA cdec | dcAB cded | 
 cAGE FDDc :: d2 af gede | dcAG EFGE | Ad d2 adfa | gedc Ad d2 | Fdef gfed | =ceAB c3 d | 
 eaag efgb | a^ged =cA (3cde :|  