Incorporate the given motif and use the alphabetical representation of the specified musical sequence to compose a distinctive musical piece.
X:1
L:1/8
M:4/4
K:D
['(fg a2)', '(fe)(fg a2)']  
X:1
L:1/8
M:4/4
K:D
 (fg |:"D" a2) ag (fe)(fg | a2) (ag) (fe)(fg | a2) ag f(efg | a2) (af a2) (a2 | b2) a2 fe d2 | 
 (e f2) (efe) ((f2 |"A" f)e)dd BA(Bc |1"D" d2) d(c d2) (fg :|2"D" d2) d(c d3) e |:  