Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
M:6/8
K:G
['B2 c d2 g', 'g2 G']  
X:1
L:1/8
M:6/8
K:G
 d | B2 c d2 g | B2 c d2 g | gfe dcB | TB3 A2 d | B2 c d2 g | B2 c d2 g | fed de^c | (d3 d2) :: 
 B/c/ | d>ed B2 d | (d3 c2) A/B/ | c>dc ABc | (c3 B2) d | g2 G GAG | g2 G G2 e | dcB BcA | 
 (G3 G2) :|  