Develop a musical work using the identified alphabetic pattern and the supplied melody as a theme.
X:1
L:1/8
M:4/4
K:D
['BG dG e2 aged BG G2 BcdB', 'a3 f']  
X:1
L:1/8
M:4/4
K:D
"^A modal" aged BGGF | G2 BG dG e2 | aged BG G2 | BcdB A2 ab | aged BGGA | (3BAG BG dG e2 | 
 aged BG G2 | BcdB A3 z || eaae g3 a | eaae gedg | ea a2 g2 ag | egdG BA A2 | a3 f g3 f | 
 a3 f ge d2 | bgag eafa | gedB A3 z ||  