Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/4
M:3/4
K:G
['B G', 'B G']  
X:1
L:1/4
M:3/4
K:G
 D | G3/2 A/ B | d B G | g3/2 e/ c | d B G | c e c | B3/2 A/ G | E c B | A3/2 D/ D | G3/2 A/ B | 
 d B G | e3/2 f/ g | d B G | E/G/ c E | D/G/ B G | F B A | G2 D || E2 G | D2 B | A2 c | B G D | 
 c3/2 B/ A | d B G | ^c3/2 d/ e | .d .e .f | g2 b | d B d | e2 g | d/B/ G D | E =c B | D B G | 
 F B A | G2 ||  