Construct a musical piece conforming to the alphabetically indicated blueprint and the supplied motif.
X:1
L:1/8
M:2/2
K:G
['B G2 G G2', 'GcGG GBGG BGBG AGFE DFAc BdBG D2']  
X:1
L:1/8
M:2/2
K:G
 (3DEF |"G" GFGA Bded | BdBG DGBG |"D7" AGEF DFAc |1"G" BdBG D2 :|2"G" B G2 G G2 _B2 :: ef | 
"G" gfga gfeg |"D" fdAd fagf |"C" ecAF"D" DFAc |1,3"G" BGBc d2 ef :|2,4"G" B G2 G G2 :: 
"^Alternate A parts:" (3DEF |"G" GFGA Bded | BdBG DGBG |"D7" AGEF DFAc |1,3"G" BdBG D2 :|2,4 
"G" B G2 G G2 _B2 ::"G" =BGBG GcGG | GBGG BGBG |"D7" AGFE DFAc |1,3"G" BdBG D2 _B2 :|2,4 
"G" B G2 G G2 :|  