Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/8
M:2/4
K:none
['GF GB']  
X:1
L:1/8
M:2/4
K:none
[K:G] (3D/E/F/ |"G" GF GB |"D7" d/c/A A/G/B/A/ |"G" GF GB |"D7" d/c/A/F/"G" G(3D/E/F/ | GF GB | 
"D7" d/c/A A/G/B/A/ |"G" GF GB |"D7" d/c/A/F/"G" G2 |:"G" B>c dB |"C" cd ee |"D7" A>B cA | 
"G" B/c/B/A/ GG | B>c dB |"C" cd ee |"D7" A>B cF |"G" GG G z ::"G" G2 F2 | G2 B2 |"D7" d2 (3(cBA) | 
"G" G2 z2 | G2 F2 | G2 B2 |"D7" d2 (3(cBA) |"G" G2 z2 :|  