Construct a musical work using the letter-based representation of the specified pattern and the given melodic subject.
X:1
L:1/4
M:4/4
K:F
['G A']  
X:1
L:1/4
M:4/4
K:F
 F z/ C/F/G/A/B/ | c2 z2 | F z/ C/F/G/A/B/ | c2 z3/2 c/ | =B G A B | c B G3/2 c/ | d G A =B | 
 d c c3/2 c/ | f f e e | d d c3/2 c/ | d d c c | B B A3/2 A/ | G A B =B | c2 z3/2 B/ | A c G c | 
 F2 z2 |]  