Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:G
['D G>A Be dB Ae dA c/B/A/G/']  
X:1
L:1/8
M:4/4
K:G
 D |"G" G>A Be |"G" dB Ae |"G" dA c/B/A/G/ |"D7" FA AB |"G" G>A"Em" Be |"G/D" d(e/f/)"C" g(f/e/) | 
"G" d(c/B/)"D7" F/G/A/B/ |"G" B"C"G"G7" G :| d |"G" g>f"C" a/g/f/e/ |"G" dB Bd | 
"G" g>f"C" e/f/g/e/ |"Em" Be"C" e2 |"D" d(e/f/)"Em" g(g/a/) |"G" b/a/g/f/"C" g(f/e/) | 
"G" d(c/B/)"D" A/B/c/d/ |"G" BG G :|  