Compose music that adheres to the given form and integrates the specified musical motif.
X:1
L:1/8
M:4/4
K:G
['B>G D4 D>EF>G A>cB>A']  
X:1
L:1/8
M:4/4
K:G
|:"^3rd part option" g/ f>g | (3efe c>G E>Gc>e | (3ded B>G D4 | D>EF>G A>cB>A | G>AB>c d>Gg>f | 
 (3ege c>G E>Gc>e | (3dgd B>G D4 | D>EF>G A>cB>A | G>gf>g G3/2 :|  