Create a musical composition based on the alphabetic representation of the predetermined pattern and the given melodic theme.
X:1
L:1/8
M:2/2
K:A
['a2 eg a2']  
X:1
L:1/8
M:2/2
K:A
 (3e/f/g/ |"A" a2 eg"E7" a2 eg |"A" a2 ea"F#7" fedc |"Bm" dfBf dfBf |"Bm" dfBa"E7" gabg | 
"A" a2 eg a2 eg |"A" a2 ea"C#/A" fedc |"D" defd"C#/A" ecBA |1"E7" E2 [GD]2"A" [AC]3 :|2 
"E7" E2 [GD]2"A" [AC]2 e2 |:"A" ceAe ceAe |"A" ceag"F#7" fedc |"Bm" dfBf dfBf |"Bm" dfba"E7" gfed | 
"A" ceAe ceAe |"A" ceag"F#m" fedc |"D" defd"C#/A" ecBA |1"E7" E2 [GD]2"A" [AC]3 e2 :|2 
"E7" E2 [GD]2"A" [AC]4 |]  