define 3D project (x) (y) (z)
go to x: (((x) * (distance to screen)) / (z)) y: (((y) * (distance to screen)) / (z))
set size to (((100) * (distance to screen)) / (z))) %
when green flag clicked
set [x v] to [0]
set [y v] to [0]
set [z v]  to [50]
forever
3D project ((x) - (camx)) ((y) - (camy)) ((z) - (camz)))
end