Construct a musical composition utilizing the provided motif and conforming to the specified structure.
X:1
L:1/8
M:2/2
K:G
['G2 DG', 'BG G2'  
X:1
L:1/8
M:2/2
K:G
 G2 DG EGDE | G2 BG AE E2 | G2 DG EGAB |1 cedc BGAF :|2 cedc BG G2 || gd d2 eB B2 | cBAc BE E2 | 
 g2 gd edBA | Bdgd BG G2 | g2 bg eB B2 | cBAc BG G2 | c2 cB cdef | gedc BGAF ||  