Construct a musical work by incorporating the designated motif and the alphabet-based framework.
X:1
L:1/8
Q:1/4=200
M:2/2
K:G
['BG G2', 'bg g2']  
X:1
L:1/8
Q:1/4=200
M:2/2
K:G
 B | AFAc BG G2 | BGBd gedB | AFAc BGBd | egdc BG G2 | AFAc BG G2 | BGBd gfga | bgag egfa | 
 gedc BGG :| a | bg g2 agef | gfge dega | bg g2 aged | eaag ea a2 | bg g2 agef | gfge dega | 
 bgag egfa | gedc BG G2 :|  