Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/8
Q:1/4=120
M:6/8
K:G
['(b/a/) g2 d', 'a2 (b/a/) g2 d e>fg f>ed d', 'G2 G B2 d (d<e)d cBA G2', 'g2 d d>ed efg f>ed (d/c/) (BGB)']  
X:1
L:1/8
Q:1/4=120
M:6/8
K:G
"^Lively" (b/a/) | g2 d e>dB | d>ef g2 (b/a/) | g2 d e>fg | a>ba a2 || (b/a/) | g2 d e>fg | 
 f>ed !fermata!g2 d | (BGB) (AFA) | G3- G2 |] | G | B2 d (d<e)d | cBA G2 (B/c/) | d2 d d>ef | 
 g3- g2 || d | d>ed efg | f>ed !fermata!g2 (d/c/) | (BGB) (AFA) | G3- G2 |]  