Craft a musical work utilizing the specified alphabetical formation and given motif.
X:1
L:1/4
M:3/4
K:Bb
['F F']  
X:1
L:1/4
M:3/4
K:Bb
 F | F B B/c/ | F/G/ _A B | _A C F | B,2 B, | B, _A, B, | C F F | F B, C | B,3- | B,2 ||  