Develop a musical composition in line with the given structure and theme.
X:1
L:1/8
M:4/4
K:A
['E2 EF A2 AB', 'eA A/A/A'  
X:1
L:1/8
M:4/4
K:A
 E2 EF A2 AB | cBAB ce e2 | f2 fe fgaf | ecBc AF F2 | E2 EF A2 AB | cBABce e2 | f2 fe fgaf | 
 ecBc A4 :: A2 Ac eA A/A/A | eAfA eA A/A/A | B2 Bd fefg | agaf ecBc | A2 Ac eAA/A/A | 
 eAfA eA A/A/A | f2 fe fgaf | ecBc A4 :|  