Generate a musical piece using the presented motif and follow the alphabetical structure provided.
X:1
L:1/16
M:2/4
K:G
['G2BG dGBG DGBd', 'g2fg dgBg dgba']  
X:1
L:1/16
M:2/4
K:G
 G2BG dGBG | DGBd g2fg | A2cA eAcA | ABcd efge | G2BG dGBG | DGBd g2eg | afge fdec | ABcd BAG2 :: 
 g2fg dgBg | dgba gfed | ea^ga ea^ga | ecaf gfed | g2fg dgBg | dgba gfeg | afge fdec | ABcd BAG2 :|  