Write a musical work incorporating the specified theme and letter-based framework.
X:1
L:1/8
Q:1/4=90
M:4/4
K:G
['B e>fgf eBB>G', 'E3 d d/d/B G>A B>cBG d>BG>B d3']  
X:1
L:1/8
Q:1/4=90
M:4/4
K:G
"_VB" B | e>fgf eBB>G | A>AAB d3 B | e>fgf eBB>G | A>GEE E3 || d | d/d/B G>A B>cBG | d>BG>B d3 B | 
 e>fgf eBB>G | A>GEE E3 |]  