Design a piece of music by fusing the provided alphabetic indicator and the predetermined tune.
X:1
L:1/8
M:2/4
K:G
['G G', 'g f a e']  
X:1
L:1/8
M:2/4
K:G
 g | d G G G | d G B G | d G G G | d2 B d | c A A A | c A B A | c A A A | d2 B :: A | G g g a | 
 g e d B | A a a b | a g Tf e | d g g a | g e d g | f a e g | f a e g | f a e g | f a e f | 
 g3/2 a/ b f | g2 f |]  