Develop a musical composition utilizing the presented motif and adhering to the required structure.
X:1
L:1/8
Q:1/2=80
M:4/4
K:G
['G2 GA BA G2 gfge dB G2', 'gfge dB G2 cBcd edcB'  
X:1
L:1/8
Q:1/2=80
M:4/4
K:G
 G2 GA BA G2 | gfge dB G2 | cBcd edcB | A2 fg af d2 | G2 GA BA G2 | gfge dB G2 | cBcd edcB | 
 cAFA G4 || g2 fg af d2 | gfge dB G2 | cBcd edcB | A2 fg af d2 | G2 GA BA G2 | gfge dB G2 | 
 cBcd edcB | cAFA G4 |]  