Craft a composition that integrates the assigned alphabet-related musical pattern and the provided melodic theme.
X:1
L:1/8
Q:1/4=90
M:6/8
K:G
['B3 d2']  
X:1
L:1/8
Q:1/4=90
M:6/8
K:G
 D |"G" D>GG G>FG | B3 d2 d |"D" d>AA AGA |"G" B3- B2 D | D>GG G>FG | B3 d2 B | 
"D/A" A>AA"A7" AB^c |"D" d3- d2 D |"D7" c>cc cdc |"G" B3 d2 B |"D7" c>cc Ad>c |"G" B3- B2 B | 
"B" B>BB B>BB |"Em" B3 B2 B |"D7" c>cE F>ED |"G" G3- G z || D |"G" G>GG G>FG | B3- B2 D | 
 B>BB B>AB | d3- dzd |"D" d>eA A2 d |"G" d>eB B2 d |"D" d>ed"D7" c>BA |"G" G3- G z |]  