Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
Q:1/4=120
M:2/2
K:A
['c e2 A [EB]3 B dBAG E4', '([ce-] [ee]2)', 'c e2 z [EB]3 c [Ed]B[Ec]d [EB]4']  
X:1
L:1/8
Q:1/4=120
M:2/2
K:A
"^Fast""^*" c e2 A [EB]3 B | dBAG E4 | E2 GE EEAd | c [AA]3 !slide![AA]3 A | ce z A E3 B | 
 GB=G-G E4 | EGBc d2 ed | cABG A4 :| ([ce-] [ee]2) ([^de-] [ee]2) [ce][ee]- | [ee]2 ef ecAc | 
 d3 d f2 [df]2 | [df]2 fg afed | ([ce-] [ee]2) [ee] edcA | (c [ee]2) e [ee]2 !slide![ee]2- | 
 [ee](ae)c E2 EE | GBAG E2 EE | GEGB dBAA | c [AA]3 !slide![AA]4 || 
"^Substitution""^*" c e2 z [EB]3 c | [Ed]B[Ec]d [EB]4 | [GB]2 BB edBd | c [AA]3 !slide![AA]4 ||  