Develop a musical piece using the given motif and adhere to the outlined musical structure.
X:1
L:1/4
M:4/2
K:Bb
['G2 F2']  
X:1
L:1/4
M:4/2
K:Bb
 F F | F2 G A B B A B | (c B) G2 F2 z F | G2 B2 c2 d2 | c4- c z (G A) | B2 A2 (c B) G2 | 
 F2 D2 B,2 C2 | D D G2 F2 D2 | C4 z2 ||  