Create a composition based on the provided motif while adhering to the necessary musical structure.
X:1
L:1/8
M:4/4
K:Bb
['d2 c2']  
X:1
L:1/8
M:4/4
K:Bb
 F>F | B3 B F3 F | D2 FD B,2 BB | c2 d2 c2 d2 | cf=ed c2 cB | A2 A2 c2 c2 | F4 z2 cd | e3 c e2 d2 | 
 d2 c2 z2 dc | B2 B2 c2 c2 | f3 d B2 BA | Gedc d2 c2 | B4 z2 |]  