Design a piece of music by fusing the provided alphabetic indicator and the predetermined tune.
X:1
L:1/8
M:2/4
K:D
['D B, A, G,']  
X:1
L:1/8
M:2/4
K:D
 A A G E | A B/ A/ G E | A2 D2 | E3/2 F/ E E | A3/2 E/ A A | E F E D/ D/ | B E, D B, | A, G, A,2 | 
 G3/2 E/ D =C | B, E D B, | A, G, A,2 |]  