Develop a musical composition by integrating the alphabetically represented musical pattern and the supplied melodic theme.
X:1
L:1/4
M:3/4
K:C
['G3/2 z/', 'G A', 'G ^F G', 'G C3- C E F G ^F']  
X:1
L:1/4
M:3/4
K:C
 G/A/ |"C" G3/2 z/ E | E z G/A/ | G3/2 z/ E | E z E/F/ | G e d | c B A |"G7" G3/2 z/ F | 
 F3/2 z/ D/E/ | G3/2 z/ F | F3/2 z/ D/E/ | G3/2 z/ F | F3/2 z/ D/E/ | F G A | B c d |"C" e3- | 
 e2 G/A/ || G3/2 z/ E | E3/2 z/ G/A/ | G3/2 z/ E | E2 E/F/ | G A B | c d e |"F" g2 f | f3 | g2 f | 
 f2 f/g/ |"C" f3/2 z/ e | e2 e | e/d/ ^c/d/ e/d/ |"G7" f B3/2 d/ |"C" c3- |"C7" c B _B || 
[K:F]"F" A3- | A G A | C3- | C F G | A ^G A | A d z/ A/ |"C7" c2 =B | B3 | G3 | G ^F G | C3- | 
 C E F | G ^F G | B A G |"F" F2 c/c/ | c c B || A3- | A G A | C3- | C F G | A ^G A | A d3/2 A/ | 
"C7" c3 | B3 | G3- | G ^F G | C3- | C E F | G ^F G | B A G |"F" F3- | F z ||  