Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/4
Q:1/4=115
M:4/4
K:G
['D D G']  
X:1
L:1/4
Q:1/4=115
M:4/4
K:G
 D |"G" D G A G |"D" G3/2 F/ F F |"D7" F c E F |"G" E2 D/ z/ D | D G B"G7" d |"C" d c G3/2 A/ | 
"G/D" B D"D7" E F | A2"G" G/ z/ || B |"G" d B e d |"D7" d3/2 c/ c A | c A d c |"G" c3/2 B/ B D | 
 D G B"G7" d | d G"C" !fermata!e e |"G/D" d G"D7" c B | B3/2 A/"G" !fermata!G |]  