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:4/4
K:G
['g2 d<B', 'G c B<Gc>B A>FD>c B>GB>G c>GB>G A>cB>d']  
X:1
L:1/8
Q:1/4=120
M:4/4
K:G
 f | g2 d<B c<Aaf | gddB gdBf | g2 d<B c<Aa>f | g>ed>B G2 G :| c | B<Gc>B A>FD>c | B>GB>G c>GB>G | 
 A>cB>d A>FD>g | d<Bc>A G2 G :|  