Develop a musical composition in line with the given structure and theme.
X:1
L:1/8
M:4/4
K:G
['', 'GABG BddB cdec dBGB ce e2 dBGB', 'dGBG eg g2 edBd eaag agef gdBA'  
X:1
L:1/8
M:4/4
K:G
 z DEF |: GABG BddB | cdec dBGB | ce e2 dBGB | AGFE DEFD | GABG BddB | cdec dBGB | ce e2 dBGB |1 
 AGFA GDEF :|2 AGFA GABc || d3 g edBc | dG G2 dGBG | eg g2 edBd | eaag agef | gdBA GABG | 
 cABG AGED | EGce dBGB |1 AGFA GABc :|2 AGFA G4 ||  