Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
Q:3/8=110
M:6/8
K:none
['g fed cAc', 'B A2 a']  
X:1
L:1/8
Q:3/8=110
M:6/8
K:none
 g | fed cAc | ecA A2 g | fed cAc | dBG G2 g | fed cAc | def gfe | agf gfe | dBG"^*" G2 :: B | 
 A2 a acA | acA A2 B | A2 a acB | acA acA | agf gfe | dBG G2 :|  