Craft a musical composition that adheres to the specified musical theme and letter-based structure.
X:1
L:1/8
M:4/4
K:Amix
['c>A A/A/A', 'c>d e>aa>g']  
X:1
L:1/8
M:4/4
K:Amix
|: e<d | c>A A/A/A c>A A/A/A | e>f e<d e2 d>e | c>A A/A/A c>A A/A/A | e>d B<c d2 :: c>d | 
 e>aa>g a>ba>g | e>f e<d e2 c>d | e>aa>g e>fg>e | d<GB>c d2 :|  