Develop a musical composition based on the outlined framework and thematic material.
X:1
L:1/8
Q:3/8=100
M:6/8
K:Bb
['D E2 D G2 F DCD B,3']  
X:1
L:1/8
Q:3/8=100
M:6/8
K:Bb
 D | E2 D G2 F | DCD B,3 | B3 A2 C | (CD)E F2 F | B2 F (GA)B | (FD)B, C3 | B,2 B, (EF)G | 
 (FE)C B,3 | B,2 B,(EF)G | (FE)C B,2 z ||  