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
Q:3/8=86
M:6/8
K:D
['a agf f2 a gfe e2 g', 'd2 A A2 A AB=c BAB G2']  
X:1
L:1/8
Q:3/8=86
M:6/8
K:D
 a | agf f2 a | gfe e2 g | fed edc | ddd d2 :| A | A2 A AB=c | BAB G2 B | B2 B Bcd | cBc A2 a | 
 agf f2 a | gfe e2 g | fed edc | ddd d2 :|  