After her father immigrated back to Laos five years ago, Mattie Do and her husband made the decision to join him in Vientiane. In doing so, Mattie and her husband became acquainted with Mr. Anousone Sirisackda of Lao Art Media, eventually developing their relationship to the point of creating a film together. After two years of production, Mattie and Lao Art Media are getting ready to release Lao’s first horror film, “Chanthaly,” in Spring 2013. “Chanthaly” will be Mattie’s first feature film. Currently Mattie, her husband, their two dogs and one cat reside permanently in Vientiane, Laos.   Little Laos on the Prairie had a chance to catch up with her for an interview. The natural question on everyone’s mind is: How did you get your start? Actually, “Chanthaly” is my start in filmmaking. I’ve never directed any short films or anything, and I never went to film school, although I worked for a film school a couple of years ago. But as a makeup artist. The great thing about being a makeup artist on …