Develop a musical composition utilizing the presented motif and adhering to the required structure.
X:1
L:1/8
M:4/4
K:Bb
['B,D F2 F2 GF F F C2', 'F3 F G2 A2 BA B G'  
X:1
L:1/8
M:4/4
K:Bb
 B,D | F2 F2 GF F F | C2 B, B, B,2 C | D | E2 E E E2 G2 | G2 A2 F3 || F | G2 A2 BA B G | 
 F2 B2 D2 B, D | F2 F2 GF F2 | C2 B, B, B,2 ||  