Construct a musical piece that contains the provided motif and abides by the prescribed alphabetical scheme.
X:1
L:1/8
M:4/4
K:Gmix
['DG G2', 'f2 de']  
X:1
L:1/8
M:4/4
K:Gmix
|: DG G2 DFCF | DG G2 dGBG | DG G2 DF F2 |1 cAFA c2 FE :|2 cAFA c2 Bc ||[K:G] dG G2 dGBc | 
 dg g2 fdcA | dG G2 dGBd | cA=FA c2 Bc | dG G2 dGBc | dg g2 ^fgag | f2 de f2 de | fgag fdcA ||  