Found it! is called
SnarlyGribbly's Snow Machine 2.3
https://www.renderosity.com/forums/threads/2967339/snarlygribblys-snow-machine-23
https://cobrablade.net/snarlygribbly/poser.html
it is a free script xD
it is doens't work on mine Poser Pro 12 Q:Q don't know why, can be cause of python is to old , to new, Poser Pro to new or old Q:Q
yup
"The Snow Machine does not work in Poser 12, only in Poser11. Snarly has mentioned that he would like to recode to work in P12 but has not gotten around to it yet." FUCK! the best script ever can't work in my new Poser Pro 12 a fucking sad news Q.Q