Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/8
M:2/2
K:G
['B2 A/B/c/A/ BG Gg dd de c3', 'B2 A2', 'dG BG', 'g/f/e/d/ B/c/d/B/']  
X:1
L:1/8
M:2/2
K:G
|: B2 A/B/c/A/ BG Gg | dd de c3 d | BGAF gfed | ^c/d/e A^c d4 :| A2 G/A/B/G/ A A2 A | 
 B(c/d/) cB B2 A2 | GG Gg GG G2 | AA Aa AA A2 | cc (cB/A/) Bedc | B2 A2 G4 | ^cccc dD DD | 
 cc cB/A/ B g2 g | ac cB/A/ Bedc | B2 A2 G4 | B2 A/B/c/A/ BGFG | B2 A/B/c/A/ BGFG | Dc cB/A/ Bedc | 
 B2 A2 G4 |][M:2/2][K:G] g | dG BG ABce | dG BG dG BG | dG BG ABce | dB ge d2 G :: e/f/ | 
 g/f/e/d/ B/c/d/B/ ABce | g/f/e/d/ B/c/d/B/ g/f/e/d/ B/c/d/B/ | cg Bg ABce | dB ge d2 G :|  