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:Eb
['GG GG']  
X:1
L:1/8
M:4/4
K:Eb
 B,E | GG GG GG FE | E D4 z2 B | BF FG AA G^F | G4 z2 | B,E | GG GG GB AG | F C4 z2 =E | 
 F=E FG AD GF | E4 z2 |]  