Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
Q:1/8=360
M:4/4
K:G
['Bddd edgd', 'g2 dg']  
X:1
L:1/8
Q:1/8=360
M:4/4
K:G
 Bddd edgd | edgd BA A2 | Bddd edgd | BGAG EG G2 :| g2 dg agbg | g2 dg ea a2 | g2 dg agbg | 
 edef gg g2 | g2 dg agbg | g2 dg ea a2 | (3bag (3agf gded | BGAG EG G2 :|  