Develop melodies adhering to the specified musical structure and using the offered theme.
X:1
L:1/8
M:2/4
K:G
['G DG B>c BA z']  
X:1
L:1/8
M:2/4
K:G
 G | DG B>c | BA z A | DF A>B | AG z G | DG B>c | BA z z/ A/ | dd cA | G3 ||  