Compose music pieces conforming to the prescribed pattern and incorporating the provided musical concept.
X:1
L:1/8
M:2/2
K:D
['A2 AB', 'agfa gfeg fedf edBA'  
X:1
L:1/8
M:2/2
K:D
 AG | FDFG A2 AB | dfed BcdB | A2 AB AFDF | G2 E2 E2 AG | FDFG A2 AB | dfec dcBA | d2 d2 efge | 
 f2 d2 d2 :|[K:Dmix] fg | agfa gfeg | fedf edBA | c2 c2 cd e2 | c2 c2 cd e2 | agfa gfeg | 
 fedf edBA | d2 d2 efge | f2 d2 d2 :|  