Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
M:2/4
K:C
['', 'g>B ce c', 'dc af cf dc b3 z dc']  
X:1
L:1/8
M:2/4
K:C
"^tr" g |:"C" eG ce | gg/c'/ e"^tr"g |"G7" fG Bd | gg/B/ f"^tr"g | fG Bd | gb/a/ g/f/e/d/ |1 
"C" cG ce | ee/G/ cg :|2"C" c2"G7" g>B |"C" ce c z |:"F" a2 fa | c'2 ba |"C" ge' c'g | ef/e/ dc | 
"G7" Bd ba | ga/g/ fB |1"C" c>c ce | g3 a/a/ :|2"C" c2"G7" g>B |"C" ce c z |:[K:F]"F" f>c"^tr" dc | 
 af cf |"C7" e>c"^tr" dc | b3 z | e>c"^tr" dc |1 be cb |"F" a>g"Bb" f>d |"C7" c3 z :|2 c'b ce | 
"F" fa"C7" c'>e |"F" fa f z |]  