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:D
['d2 A A2 F GAB A3 Bcd', 'BGB AFA']  
X:1
L:1/8
M:6/8
K:D
"^A" d2 A A2 F | GAB A3 | Bcd efg | fed cBA | d2 A A2 F | GAB A3 | Bcd cde | Adc d3 :: 
"^B" e2 A A2 f | efg f3 | efg fed | cdB A2 A | BGB AFA | BGB AFA | Bcd cde | Adc d3 :|  