Create a piece of music utilizing the given motif and adhering to the specified structure.
X:1
L:1/8
M:4/4
K:C
['ec c2', '(ec)gc (ac)gc'  
X:1
L:1/8
M:4/4
K:C
 f | ec c2 Gc c2 | ec c2 (eg)ga | ec c2 (Gc)EG | F_ED_B, DFF :| f | (ec)gc (ac)gc | (ec)gc (eg)ga | 
 (ec)gc (ac)gc | (d/c/_B) fB (df)fg | (e/d/c) gc (ac)gc | (ec)gc (ef)ga | ecdB cGAF | 
 (D/_E/F) _BF DB,B, ||  