box b1 200 200 200 
box b2 150 100 100 100 100 200 
bfuse boite b1 b2
nexplode boite f
profile cont S boite_3 F 75 50 X 50 Y 100 X -50
featrevol boite cont boite_3 200 0 200 0 1 0 1 1
featperformval revol result 290

set square 400997