Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/16
M:2/4
K:G
['B2Bd B2Bd B2G2A2B2 cBcd c2B2 A6 (3ABc', '(ga) b2a2 gfef a2g2 f2fg a2g2 fede']  
X:1
L:1/16
M:2/4
K:G
 G2 | B2Bd B2Bd | B2G2A2B2 | cBcd c2B2 | A6 (3ABc | d2ag f2ag | f2d2e2f2 | gfga g2e2 | dedc BAGA | 
 B2Bd B2Bd | B2G2A2B2 | cBcd c2B2 | A6 (3ABc | d2ag f2ag | f2d2e2f2 | gfga gfef | [dg]6 (ga) || 
 b2a2 gfef | a2g2 f2fg | a2g2 fede | f2e2 dBGA | B2Bd B2Bd | B2G2A2B2 | cBcd c2B2 | A6 (3ABc | 
 d2ag f2ag | f2d2e2f2 | gfga gfef | [Bg]4 [Bg]2 ||  