Develop a musical composition utilizing the presented motif and adhering to the required structure.
X:1
L:1/8
M:3/4
K:Amin
['ec A2 z2 ^cdef ge Tf2{ef} A2', 'ge fe dfed ^cdec Ac defg aA'  
X:1
L:1/8
M:3/4
K:Amin
|:"^A"{f} ec A2 z2 | ^cdef ge | Tf2{ef} A2 (d^c) |{c} d2 d4 ::"^B" f({gf)}efg af | gfef ge | 
{g} fe dfed | ^cdec Ac | defg aA | d2 A4 :|  