Construct a musical composition utilizing the provided motif and conforming to the specified structure.
X:1
L:1/8
M:2/2
K:A
['A2 a2{/b} (a/g/f/g/) a2 aece (Tfe)(dc)', 'Aece Aece Aeca (Tfe)(dc)'  
X:1
L:1/8
M:2/2
K:A
 A2 a2{/b} (a/g/f/g/) a2 | aece (Tfe)(dc) | B2 b2 (b/^a/g/a/) b2 | bB^df bfg=a | 
 A2 a2{/b} (a/g/f/g/) a2 | aece (Tfe)(dc) | defg aedc | Bbfb (ag)(fa) || Aece Aece | 
 Aeca (Tfe)(dc) | Bf^df Bfdf | bB^df bfga | Aece Aece | Aeca (Tfe)(dc) | defg aedc | 
 Bbfb (ag)(fa) |]  