Develop a musical composition that aligns with the given structural outline and thematic content.
X:1
L:1/8
M:4/4
K:A
['B,2 CEAB AECE D2 BA', 'aaag fgaf'  
X:1
L:1/8
M:4/4
K:A
 A,B,CE DB, B,2 | CEAB AECE | D2 BA GEEc | d2 c2 BAFE | A,B,CE D2 B,2 | CEAB AECE | D2 BA GEEF | 
 GABG A4 :: aaag fgaf | eeef eAcA | Bcdc BGFE | ABcd ecBA | aaag fgaf | e2 ef eAcA | Bbba gggf | 
 e2 dB A4 :|  