Develop a musical composition in line with the given structure and theme.
X:1
L:1/8
M:4/4
K:G
['GFEG BEGB EGBE cEBE', 'G3 A'  
X:1
L:1/8
M:4/4
K:G
|: GFEG BEGB | EGBE cEBE | GFEG B3 G | AF F2 DF F2 | GFEG BEGB | EGBE cEBE | G3 B AGBG | 
 A3 B AGFA :: G3 A BDBA | GA (3Bcd eg g2 | G3 A AGBG | A3 B AD D2 | G3 A BDBA | GA (3Bcd eg g2 | 
 afge d3 B | AGFG A2 AF :|  