Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
Q:1/8=180
M:2/2
K:G
['ge dBAB GFEF G2 BG dGBe dBAB', 'gdBd dega bgab gafg efge dega bagf']  
X:1
L:1/8
Q:1/8=180
M:2/2
K:G
 ge | dBAB GFEF | G2 BG dGBe | dBAB GFED |1 Beed ef :|2 EGFA G2 z2 || dega bgab | gfga gdBd | 
 dega bgab | gafg efge | dega bagf | gfef g3 a | bagf gfed | (3efg dg efge ||"^final" g8 |]  