Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
M:4/4
K:G
['D G2 D>C B,<G G,>G c>BA>G F<D', 'G d g>dB>d g>dB>d c>BA>G F<D D>F']  
X:1
L:1/8
M:4/4
K:G
 D | G2 D>C B,<G G,>G | c>BA>G F<D D>F | G>BA>c B>dc>e | d<g d>c B<G G :: d | g>dB>d g>dB>d | 
 c>BA>G F<D D>F | (3GAB (3ABc (3Bcd (3cde | d<g d>c B<G G :|  