Design a tuneful piece that utilizes the given musical sequence as a key element.
'Sectional: Through Composed'  
X:1
L:1/4
M:3/4
K:none
[K:D] A B c | d3 | e d e | f3 | .d' !>!c'3/2 b/ | b2 c | .d' !>!c'3/2 b/ | b2 d | A B c | d3 | 
 e d e | f3 | a ^g f | e a/c'/ e' | d'/d'/ d' ^g | a z a || f/a/ a2 | f/b/ b2 | f/a/ .d' .c' | 
 d'3/2 c/ c | g/a/ a2 | g/b/ b2 | g/a/ .c' .b | f3/2 a/ d | f/a/ a2 | f/b/ b2 | f/a/ .e' .c' | 
 c'3/2 b/ b | d'2 c'/d'/ | d'2 c'/b/ | b/b/ b c | d z d |:[K:G] g f e | d g B | B c d | e a c | 
 z/ c'/ c' b | a ^g a |1 z/ c'/ b a | g z d :|2 z/ b/ b a | g f g || c/d/ e/f/ g/a/ | .b .b .b | 
 b c'3/2 e/ | d3 | f a3/2 d/ | ^c f e | d g3/2 B/ | B2 d | c/d/ e/f/ g/a/ | .b .b .b | 
 d' c'3/2 e/ | b2 a | a g3/2 B/ | e d3/2 F/ | G3 | G z z |]  