Develop a musical composition that aligns with the given structural outline and thematic content.
X:1
L:1/8
M:3/4
K:Bb
['F2 B2']  
X:1
L:1/8
M:3/4
K:Bb
 DE | F2 B2 AG | F2 DDEC | B,4 DE | F2 B2 cd | e2 F2 d>c | B2 z2 F>D | E2 c2 F>E | DF B2 FD | 
 E2 c2 FE | DF B2 DE | FFBBAG | F2 B2 AG | F>FdBcA | B4 |]  