Compose music by following the designated structure and integrating the suggested musical idea.
X:1
L:1/4
M:4/4
K:F
['G A B']  
X:1
L:1/4
M:4/4
K:F
 F | F G A B | c2 c c | G A B c | A3/2 G/ F G | G3/2 G/ G A | B B B A | G F F E | F E/D/ C G | 
 G3/2 G/ G A | B B B A | G F F E | F3 |]  