Construct a musical composition utilizing the provided motif and conforming to the specified structure.
X:1
L:1/8
Q:3/8=90
M:6/8
K:Gmin
['D (GB/c/)d dBG (FA/B/)c cAF G(B/c/d) g(=e/f/g)']  
X:1
L:1/8
Q:3/8=90
M:6/8
K:Gmin
 D | (GB/c/)d dBG | (FA/B/)c cAF | G(B/c/d) g(=e/f/g) | d(B/c/d) cBA | G(B/c/d) dBG | 
 F(A/B/c) cAF | GBd gfd | cBA G2 |:  