Develop a musical piece using the given motif and adhere to the outlined musical structure.
X:1
L:1/8
M:2/4
K:C
['fG dG']  
X:1
L:1/8
M:2/4
K:C
 fG dG | fG dG | ecgc | c'cgc | fG dG | fG dG | ecdB | cC (3CDC z :|  