Construct a musical work that combines the specified alphabet-based pattern with the given melodic theme.
X:1
L:1/4
Q:1/4=120
M:3/4
K:G
['G3 G3']  
X:1
L:1/4
Q:1/4=120
M:3/4
K:G
"^Allegretto.""^1." G2 A | B2 G | c2 B | (B A) G | c2 B | (B A) G |"^2." B2 c | d2 B | e2 d | 
 (d c) B | e2 d | (d c) B |"^3." G3 | G3 | G3 | G3 | G3 | G3 |]  