Develop a musical composition by utilizing the given alphabetic notation and supplied motif.
X:1
L:1/8
M:6/8
K:Bb
['fdb{a} g2 f', 'B3 =B2 c c(G/F/E/D/) C2 d A2']  
X:1
L:1/8
M:6/8
K:Bb
 fdb{a} g2 f | ecB{B} A2 B | cde fga | bfd"^tr" c3 | fdb{a} g2 f | gcB AGF | GAB cde | 
 fdc"^tr" B3 :: (3f/e/d/cc"^tr" =B2 c | c(G/F/E/D/) C2 d | (3e/d/c/BB"^tr" A2 B | 
 B(F/E/D/C/) B,2 d | b2 g fdB | ecB AGF | GAB ged |"^tr" c3 B3 :|  