Create a musical composition based on the alphabetic representation of the predetermined pattern and the given melodic theme.
X:1
L:1/8
M:2/2
K:G
['g2 dc', 'b2 bg a2 ag gfge d2']  
X:1
L:1/8
M:2/2
K:G
 dc | Bdga g2 dc | Bdga g2 dc | Bdag fedc | Bdac fedc | Bdag g2 dc | Bdga g2 dc | Bdeg fgaf | 
 g2 b2 g2 :| ga | b2 bg a2 ag | gfge d2 cB | cdec BcdB | A2 a2 a2 fa | b2 bg a2 ag | gfge d2 d2 | 
 efge fgaf | g2 b2 g2 :|  