Develop a musical composition based on the outlined framework and thematic material.
X:1
L:1/8
M:4/4
K:F
['cFAc FGAc c2 B2 G3 A B2', 'agfa g3 g gfde fgfd c2'  
X:1
L:1/8
M:4/4
K:F
|: cFAc FGAc | c2 B2 G3 A | B2 G2 d3 d | d2 c2 A4 | cFAc FGAc | c2 B2 G3 A | B2 G2 d2 c2 | F4 F4 :: 
 a4 agfa | g3 g gfde | fgfd c2 Ac | d2 (3ggg g2 fg | a3 a agfa | g3 g gfde | fgfd c2 (3ABc |1 
 d2 (3fff f4 :|2 d2 f2 [Af]4 ||"^variation for Part B measures 5 and 6" acaa acfa | gBgg gfde ||  