Develop a musical work by incorporating the assigned alphabetic representation and given melody.
X:1
L:1/8
M:2/2
K:Bb
['gf d2']  
X:1
L:1/8
M:2/2
K:Bb
"Bb" F B2 c dcBc | d f2 g f4 |"Gm" g2 ga gf d2 |"F" c2 cd cB G2 |"Bb" F B2 c dcBc | d f2 g f4 | 
"Gm" gfga gf d2 |"F" cB A2"Bb" B4 ::"Gm" g2 ga gf d2 |"Bb" fdfg f4 |"Gm" g2 ga ba g2 | 
"Bb" fe d2"F" c4 |"Bb" F B2 c dcBc |"Bb" d f2 g f4 |"Gm" gfga gf d2 |"F" cB A2"Bb" B4 :|  