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:D
['A3 G F2 E2']  
X:1
L:1/8
M:4/4
K:D
 D D2 D2 |"D" A3 A A2 A2 |"G" B3 B B2 B2 |"A7" A3 G F2 E2 |"D" D3 :: E F2 D2 |"A" E3 E F2 D2 | 
 E4 E2 FG |"A7" A3 G F2 E2 |"D" D3 :|  