How do you CHANGE the COLOUR for the MOUSE-TRAIL?

I tested the mouse trail work tutorial and its works just fine. But I am wondering how do you change the colour of it?? CUz its standard black and I dun know if’s stated in the script. The tutorial can be found on Special Effects section.

Pls let me know. CUz I am doing it on a black blackground… doesnt work too work does it? I want it white.

Thanks!
Mave
maverlicious@ozonline.com.au