help needed

if someone can help me:
i want to know how the points can be marked randomly using a 3D axis
thanx in advance

Can you be more pecise about what you want ?

Here is some pseudocode, if you want to create points randomly placed inside a cubic space :

for (all points) {
x= random (0,range)
y= random (0,range)
z= random (0,range)
create point(x,y,z)

(random is a function that returns a random float evenly distributed in the parameters range)