Construct a musical work using the letter-based representation of the specified pattern and the given melodic subject.
X:1
L:1/8
M:4/4
K:G
['G2 G2']  
X:1
L:1/8
M:4/4
K:G
 G2 G2 G2 G2 | FG AF G2 D2 | B2 B2 B2 B2 | AB cA B2 G2 | e2 e2 d3 B | c2 c2 B3 G | E2 A2 A3 G | 
 FD EF GA Bd | e2 e2 d3 B | c2 c2 B3 G | E2 A2 A3 G | FD EF G2 D2 |]  