Compose a music piece that includes the specified motif while adhering to the outlined alphabetical sequence.
X:1
L:1/8
M:2/2
K:G
['B>G (3GGG', 'g a bgfg (eg)(dg) cBcd eAA [gc]']  
X:1
L:1/8
M:2/2
K:G
 c | B>G (3GGG Bcdc | BGBd eAAc | B>G (3GGG BcdB | dega bg g :| a | bgfg (eg)(dg) | 
 cBcd eAA [gc] |1 bgfg egdg | egfa bgga :|2 BGGB cAAg | fdef g2 z |]  