r1 = Ray.new(Vector3.new(1,2,3), Vector3.new(1,2,3))
for x = -1, 8, 3 do
    for y = 0, 9, 3 do
        for z = 1, 10, 3 do
            point = Vector3.new(x, y, z)
            print(point .. "     " .. r1.ClosestPoint(r1, point)) -- I *think* this is right. It's been a while since I used Lua. =P
        end
    end
end