Develop a musical piece by utilizing the alphabet-based notation of the selected musical form and the provided melodic idea.
X:1
L:1/8
M:3/8
K:G
['A>BA A>BA']  
X:1
L:1/8
M:3/8
K:G
 DGG | F>ED | cAF | AG z | DGG | F>ED | cAF | G2 z | A>BA | A>BA | A>BA | A>BA | GFE | D c2 | 
 B/A/G/F/E/F/ | G2 z |]  