Create musical compositions adhering to the given structure and incorporating the provided musical concept.
X:1
L:1/8
M:4/4
K:D
['d2 d2', 'ae ffaf e(d (f a2) (a b2)'  
X:1
L:1/8
M:4/4
K:D
"D" d2 d2 fdef | defd e(dBA) | d2 d2 fde(d |"A" BA)Bd"D" e(dBA) |"D" d2 d2 fdef | defd e(dBA) | 
 d2 gdfd ed |"A" (BA)Bd e"D"d !>!d2 ||"D" (f a2) (a2 b) ae | ffaf e(d !>!d2) | (f a2) (baf)e (d | 
"A" BA)Bd"D" e(d !>!d2) |"D" (f a2) (a2 b) ae | ffaf e(d !>!d2) | (f a2) (a b2) B2 | 
"A" defd e"D"(d !>!d2) ||  