Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
M:9/8
K:G
['ce/f/g/e/ gce', 'e/f/gf e/f/gf edc dgf', 'c/B/c/d/e/f/ gce Tc2 e', 'gce gce']  
X:1
L:1/8
M:9/8
K:G
 Te3 ce/f/g/e/ gce | d3 GB/c/d/B/ dBG | e3 ce/f/g/e/ gce | dgf dcB c2 G :: e/f/gf e/f/gf edc | 
 dgf dgf dcB | e/f/gf e/f/gf edc | dgf dcB c2 G :: c/B/c/d/e/f/ gce Tc2 e | 
 d/c/B/c/d/B/ GB/c/d/B/ dBG | c/B/c/d/e/f/ gce Tc2 e | dgf dcB Tc2 G :| gce gce gce | gBd gBd gBd | 
 gce gce gce | dgf dcB Tc2 G :|  