Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/4
Q:1/4=120
M:3/4
K:C
['(G2 A) (E2']  
X:1
L:1/4
Q:1/4=120
M:3/4
K:C
"^Waltz" C | (E2 G) | (E2 D) | C2 A, | C2 G | A2- A | c2- c | G3- | G2 G | (c2 d) | (c2 A) | 
 (G2 A) | (E2 C) | (G2 A) | (E2 D) | C3- | C2 |]  