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:Edor
['E2 BE', 'efge fgaf gfed', 'E2 BE GABe dBBA', 'fgaf gfed']  
X:1
L:1/8
M:2/2
K:Edor
 E2 BE GABG | E2 BG ADDF | E2 BE GABe | dBAd BEED | E2 BE GABG | E2 BG ADDF | E2 BE GABc | 
 dBAd BEEd || efge fgaf | gfed edB/c/d | efge fgaf | gfed Beed | efge fgaf | gfed efga | 
 bgaf gfed | eBBA GEFD ||"^Variations from various sources:" E2 BE GAB/A/G | E2 BG AFDF | 
 E2 BE GABe | dBBA BFAF | E3 F GABG | E2 BG ADFD | E2 BE GABe | dBBA BE E2 || efge fgaf | 
 gfed edBd | efge fgaf | gfed e3 d | efge fgaf | gfed edBd | bgaf gfed | eBBA GBFB ||  