Develop a musical composition utilizing the presented motif and adhering to the required structure.
X:1
L:1/8
M:4/4
K:G
['d B>GGG G>GGG AGFG A>Bcd BGGG GGGG', 'c c B>ddd dddd edcB A>Bcc ccc>c'  
X:1
L:1/8
M:4/4
K:G
 d | B>GGG G>GGG | AGFG A>Bcd | BGGG GGGG | AGFG A>B c || c | B>ddd dddd | edcB A>Bcc | 
 ccc>c cccc | dcBA G>A B z | G3 G F F2 F | E>EEE D2 D2 | cccc BBBA | BGcA F2 G2 ||  