Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
M:9/8
K:G
['BAG GEG', 'c Bcd ded dBG', 'BAG GEG']  
X:1
L:1/8
M:9/8
K:G
 d/c/ | BAG GEG GEG | BAG EFG A2 c | BAG GEG GAB | cBA BGE D2 || c | Bcd ded dBG | Bcd edB A2 c | 
 Bcd ded dBG | cBA BGE D2 || !fermata!d/c/ | BAG GEG GEG | BAG EFG A2 c | BAG GEG GAB | 
 cBA BGE D2 |]  