Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
Q:1/8=160
M:6/8
K:G
['D GDD EDD GAB c2 d edc', 'd edd gdd edB c2 d edc']  
X:1
L:1/8
Q:1/8=160
M:6/8
K:G
 D | GDD EDD | GAB c2 d | edc BcA | AGE E2 D | GDD EDD | GAB c2 d | edc BcA | AGG G2 :| d | 
 edd gdd | edB c2 d | edc BcA | AGE E2 d | edd gdd | edB c2 d | edc BcA | AGG G2 :|  