Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/16
Q:1/4=100
M:2/4
K:D
['fgfd a2a2a2f2 gage']  
X:1
L:1/16
Q:1/4=100
M:2/4
K:D
 A2 | dfdA fgfd | a2a2a2f2 | gage fgfd | e2e2e2A2 | dedA fgfd | a2a2a2f2 | gage faec | d2d2d2 ::  