Help with adjusting snow effect code

**[size=2]i created a dot representing a snowball with instance name “snow”, with another layer named action where i kept the action code.
**[size=2]I need to create a snow effect, I got this code from this website:- for (k=0; k<50; k++) {

duplicateMovieClip(_root.snow, “snow”+k, k);


The problem is, i cant fit it into my 450x300 screen, its stays at 200x200, what do i have to do next to make it 450-300, any help is appreciated.

the link where i got the code from is here:-

I just need to know how to make it fit my 450x300 screen.