Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/8
Q:1/8=100
M:4/4
K:G
['B,2 E2']  
X:1
L:1/8
Q:1/8=100
M:4/4
K:G
|: B,2 |"Em" E2 EF GFGA |"G" B2 B2 GFGA |"Em" B2 E2 EFGE |"D" FGFE D2 B,2 |"Em" E^DEF GFGA | 
"G" BAGB d2 dc |"Em" B2 E2"D" GFE^D |"Em" E6 :| B2 |"Em" e2 e2 Bdef |"Am" gagf edef | 
"Em" e2 B2 BAB^c |"Bm" ded^c B^cd/^c/B |"Em" e2 B2 Bdef |"Am" gagf efed |"Em" Bde/f/g"Bm" fed/e/f | 
"Em" e3 f e2 ef |"Am" g2 ge f2 fd |"Am" edB^c d2 de |"D" dBAF"G" GAB^c |"D" dBAF"G" GFED | 
"Em" B,2 E2 EFGA |"Em" B2 ef e2 ef |"Em" edBA"D" GEFD |"Em" E2 F/E/D E2 ||  