Construct a musical composition utilizing the provided motif and conforming to the specified structure.
X:1
L:1/8
M:4/4
K:G
['G>A B3 B B2', 'c2 B2'  
X:1
L:1/8
M:4/4
K:G
 G>A | B3 B B2 d2 | c2 B2 A2 G2 | A6 G>A | B3 B B2 e2 | c2 B2 A3 G | G6 || B>c | d3 B G2 B2 | 
 c2 B2 A2 G2 | A6 G>A | B3 B B2 d2 | c2 B2 A3 G | G6 ||  