Construct a piece of music using the designated motif as the basis, while ensuring the required form is followed.
X:1
L:1/8
Q:1/4=140
M:4/4
K:G
['G2 dB', 'c2 B2'  
X:1
L:1/8
Q:1/4=140
M:4/4
K:G
"^NB1" z | G2 dB G2 dB | cdcB A/G/F D2 | G2 dB G2 dB | cAGF G3 :: d | gfed c2 B2 | 
 ABcA B2"^NB2" Gd | gfed"^NB3" c2 B2 | AcAF"^NB4" G3 :|  