Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/8
Q:1/2=70
M:2/2
K:G
['eAAg G/G/G', 'gage agab gage']  
X:1
L:1/8
Q:1/2=70
M:2/2
K:G
 g | G/G/G Bd eAAg | G/G/G BG dGBG | cdBd eAAg | G/G/G GE E2 G :: e/f/ | gage agab | gage gage | 
 gage agab | gage g2 b2 | G/G/G Bd eAAg | G/G/G BG dGBG | cdBd eAAg | G/G/G GE G2- G"^?" :|  