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
M:3/4
K:G
['gb/g/ gb/g/', 'GB GB']  
X:1
L:1/8
M:3/4
K:G
 gb/g/ gb/g/ gb/g/ | ag/f/ gf/e/ fe/d/ | g>b g>b g>b | ba ag gd | de/f/ ge/c/ BG | 
 c/B/A/F/ G2 G,2 :: GB GB GB | GF/G/ AA/G/ FD | GB GB GB | GF/G/ AA/G/ FD | de/f/ ge/c/ BA/G/ | 
 AG/F/ G2 G,2 :|  