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:Bmin
['gfe fdB', 'f2 f']  
X:1
L:1/8
M:6/8
K:Bmin
|: Bdf Bdf | gfe fdB | Bdf fed | cee edc | Bde fed | gfe fdB | dff fed | cdc B2 f :: bff aff | 
 gfe f2 f | bag agf | efg f2 f | bag agf | efg f2 f | dff fed | cdc B3 :|  