Construct a musical composition utilizing the provided motif and conforming to the specified structure.
X:1
L:1/8
Q:1/8=120
M:6/8
K:G
['dcB cBA B/c/d z', 'B3 z2'  
X:1
L:1/8
Q:1/8=120
M:6/8
K:G
"^moderate" G | B2 c dcB | cBA B/c/d z | e3 dcB | cBA B/c/d z | g3 fed | d/e/ =f2 edc | 
 c/d/ e2 dcB | ABG F2 || d | GAB cde | =fed e2 G | E2 G F/G/AF | G/A/BG Azc | e2 c ABc | 
 d/c/BA GAB | c>dc cBA | B3 z2 d | g>fg d>cd | B3 z2 G | dcB AGF | E3 c3 | BAG EAF | G3- G3 |]  