Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
Q:1/4=120
M:6/8
K:G
['G2 G G2 B', 'd3 Tg3 aga', 'gdB gdB']  
X:1
L:1/8
Q:1/4=120
M:6/8
K:G
"^Slow" D | G2 G G2 B | A>GA BGE | DEG G2 g | Te2 d efg | G2 G G2 B | TA>GA BGE | (e/f/g)e dBd | 
 dBG G2 :: B | d3 Tg3 | aga bge | d3 Tg3 | aga b3 | d3 Tg3 | aga bge | (e/f/g)e dBd | dBG G2 :: 
 e/f/ | gdB gdB | TA>GA BGE | gdB gdB |{f} Te2 d efg | gdB gdB | TA>GA BGE | (e/f/ge) dBd | 
 dBG G2 :|  