Craft a musical composition by incorporating the provided motif and the alphabetical representation of the given sequence.
X:1
L:1/4
Q:3/4=80
M:9/4
K:Gmix
['F3/2 G/ F', 'f3/2 g/']  
X:1
L:1/4
Q:3/4=80
M:9/4
K:Gmix
 C | F3/2 G/ F c3/2 d/ c A G F | G3/2 A/ G G A c d2 c | F3/2 G/ F f e d c A F | 
 G3/2 F/ G A G F D2 :| f | f c f f3/2 g/ f e3/2 d/ c | d c d f3/2 g/ a g2 f | 
 f3/2 g/ a a g f e3/2 d/ c | d e f c A F G2 |]  