Construct a musical composition utilizing the provided motif and conforming to the specified structure.
X:1
L:1/8
M:2/2
K:G
['G/G/G G2', '(B/c/d) de'  
X:1
L:1/8
M:2/2
K:G
|: G/G/G G2 BABg | G/G/G G2 dB A2 | G/G/G G2 BABd | egdg Bg A2 :: (B/c/d) de gded | 
 (B/c/d) de gB A2 | B/c/d de gded | (3(cdc) (3(BcB) gB A2 :|  