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:6/8
K:G
['e3 def', "dBG ded dfd dfd b3 ab^c d'c'b", 'G2 g']  
X:1
L:1/8
M:6/8
K:G
 GAG GBG | GBG e3 | def gab | c'ag fed | GAG dBG | gdB e3 | def gfe | ded dBG :: ded dfd | dfd b3 | 
 ab^c d'c'b | aba fed | ded afd | ded e3 | def gfe | ded dBG :: G2 g B2 g | G2 g e3 | def gab | 
 c'ag fed | g3 e3 | dBG !fermata!e3 | def gfe | ded dBG :|  