Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/4
Q:1/2=120
M:2/2
K:G
['B d', 'd (e/f/)', 'z z', 'B G', 'B d', '(e/f/) g d d']  
X:1
L:1/4
Q:1/2=120
M:2/2
K:G
"_Unedited" B G G B | d B d f | A F F A/B/ | c F A c | B G G B | d c d g | f d c A | G- G :: 
"^sic" g d/ d (e/f/) | g/ d/ d3/2 f | c/ c3/2 (e/f/) g | c/ c3/2 f d | d (e/f/) g d | d g e c | 
 A F G G :| z z z z | z z z z | z z z z ||"^Edited by CGP" |: B G G B | d B d f | A F F A/B/ | 
 c F A c | B G G B | d c d g | f d c A | G2 G2 ::"^sic" g3/2 d/ d (e/f/) | g d d3/2 g/ | 
 f c c (d/e/) | f c c (e/f/) | g d d (e/f/) | g d d g | e c A F | G2 G2 :|  