Construct a musical composition utilizing the provided motif and conforming to the specified structure.
X:1
L:1/16
M:2/4
K:A
['', 'ecac fecf ecAc BABc dBGB EGBG', 'A,CEC DFAF EGBc A2Ac ecac'  
X:1
L:1/16
M:2/4
K:A
 Ac |: ecac fecf | ecAc BABc | dBGB EGBG | ABcf e2Ac | ecac fecf | ecAc BABc | dBGB EGBG | 
 AcBG A2Ac :: A,CEC DFAF | EGBc A2Ac | ecac fecf | ecAc B2 (3cBA | A,CEC DFAF | EGBc A2Ac | 
 ecac BAGB | AcBG A2A2 :|  