Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
M:2/4
K:C
['f ed z', '.f2 a2 gf', 'eb cb ag .f2 .a2 .f2']  
X:1
L:1/8
M:2/4
K:C
"C" c'2 ba | g3 ^f | ag cd | e3 f |"G7" ed z f | ed z f | dc Bd | g4 |"C" c'2 ba | g3 ^f | ag cd | 
 e2 z f |"G7" ed z e |"C" dc z e |"G7" g2 B2 |"C" c2 z2 |:"G7" G2 A2 | GB e>d |"C" d3 c | G3 c | 
"G7" B2 g2 | g^f/g/ ag |1"C" (e4 | e)d cA :|2"C" (c4 | c2) cc ||[K:F]"F" .f2 .f2 | a2 gf | 
"C7" eb eb | .e2 cc | .g2 .g2 | b2 ag |"F" fa fa | f2 cc | .f2 .f2 | a2 gf |"Bb" .d2 .d2 | g3 f | 
"C7" ec' eb | cb ag |"F" .f2 .a2 | .f2 z2 |]  