Compose a musical piece in accordance with the outlined theme and structure.
X:1
L:1/8
M:6/8
K:D
['AFD BGE', '(fdf){b} (aga)'  
X:1
L:1/8
M:6/8
K:D
 AFD BGE | ecA{e} d3 | AFD BGE | CDE A,3 | AFD BGE | ecA{e} d3 | AFD GEC | FDC D3 :: 
 (fdf){b} (aga) | (ece){b} (aga) | (fdf){b} (aga) | cde A3 | (fdf){b} (aga) | (ece){b} (aga) | 
 (fdf){b} (aga) | aec A3 | (AFA) (GEG) | FDC D3 :|  