Utilize the alphabetic system of the specified musical pattern and the supplied melodic theme to create a piece of music.
X:1
L:1/8
Q:1/8=120
M:2/4
K:G
['GB B/c/B/A/ GB', 'g2 g>f ga a>g fd', 'AG F>E FD FG Ac B2 cB/c/']  
X:1
L:1/8
Q:1/8=120
M:2/4
K:G
 D | GB B/c/B/A/ | GB B>A | FA A/B/A/G/ | FA D2 |"^5" GB B/c/B/A/ | GB d>g | fd cA | G2 G :| d | 
"^9" g2 g>f | ga a>g | fd de | fg af |"^13" g2 g>f | ga a>g | fd cA | G2 G :| A |"^17" B2 c^c | 
 dc AG | F>E FD | FG Ac |"^21" B2 cB/c/ | dc Ag | fd cA | G2 G :|  