Develop a musical composition that aligns with the given structural outline and thematic content.
X:1
L:1/8
M:4/4
K:G
['c BGdB BGG_B A=FcF AFFA BGdG BGGg', 'AFFg bgaf gdd=f egfa gGGg bgaf gdde'  
X:1
L:1/8
M:4/4
K:G
 c | BGdB BGG_B | A=FcF AFFA | BGdG BGGg |1 egdg BGGc :|2 egdg BGGg |: bgaf gdde | =fdc_B AFFg | 
 bgaf gdd=f | egfa gGGg | bgaf gdde | =fdc_B AFFA | G_BAc Bdc_e |1 dgfa gGGg :|2 dgfa gGG ||  