Construct a musical composition utilizing the provided motif and conforming to the specified structure.
X:1
L:1/8
M:4/4
K:A
['eA A/A/A cBce', 'B g abaf e/e/e ef =g2 ag'  
X:1
L:1/8
M:4/4
K:A
|: f | eA A/A/A cBce | fgag fecf | eA A/A/A cBce | fbec B/B/B B :: g | abaf e/e/e ef | 
 =g2 ag fece | abag fecf | ecBc e/e/e e :|  