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=120
M:6/8
K:C
['ded A2 G F2 A d3 def', 'A3 fgf fgf']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:C
[K:D] ded A2 G | F2 A d3 | def e2 d | c2 B A3 | ded A2 G | F2 A d3 | def e2 d | a3 A3 :| fgf fgf | 
 g2 e e2 f | g2 f e2 d | cdB A3 | fgf fgf | gfg a2 g | fed Adc | d3 D3 :|  