Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
M:6/8
K:G
['D ABc FDD ABc d2', 'd gfe dBG B2']  
X:1
L:1/8
M:6/8
K:G
 D |:"G" GFG"Am" ABc |"G" BAG"D" FDD |"G" GFG"Am" ABc |"G" BAG"D" d2 D |"G" GFG"Am" ABc | 
"G/B" BAG"Am/C" A2 B/c/ |"G" dBG"D" AFD |1"C" GF"D"A"G" G2 D :|2"C" GF"D"A"G" G2 d |:"G" gfe dBG | 
"C" edc"G" B2 G |"C" cBA"G/B" BGF |"Am" EFG"D" A2 d |"G" gfe dBG |"C" edc"G" B2 B/c/ | 
"G" dBG"D" AFD |1"C" GF"D"A"G" G2 d :|2"C" GF"D"A"G" G3 ||  