Construct a musical piece that contains the provided motif and abides by the prescribed alphabetical scheme.
X:1
L:1/8
M:2/2
K:G
['B2 dB AGEG AcBA GFGA', 'g2 fg', 'gf (3efg ed B2 dB A2 GB', 'GA BGBd g2 fg agfg e2 dB']  
X:1
L:1/8
M:2/2
K:G
 gf | efed B2 dB | AGEG AcBA | GFGA BG (3Bcd | egdB A2 Bd | (3efg ed B2 dB | AGEG AcBA | 
 GFGA (3Bcd Ac | B2 G2 G2 :: GA | BG (3Bcd g2 fg | agfg edBd | g2 fg edBd | (3efg dB A2 GA | 
 (3Bcd ef g2 fe | dBAG AcBA | GFGA (3Bcd Ac | B2 G2 G2 :|"^Variations:" gf | (3efg ed B2 dB | 
 A2 GB AcBA | G2 GF GA (3Bcd | e2 A2 A2 gf | efed BedB | AGAB AcBA | G3 A Bedc | B2 G2 G2 :: GA | 
 BGBd g2 fg | agfg e2 dB | dgfg edBd | e2 A2 A2 Bd | edef g2 fe | dBAG AcBA | G3 A Bedc | 
 B2 G2 G2 :|  