mascara.js

// create list of list with three strings each

strings = [
    ["p1", "p2", "p3"],
    ["p4", "p5", "p6"],
    ["p7", "p8", "p9"]
]

// function to return a random row of the input list
function getRow() {
    return strings[Math.floor(Math.random() * strings.length)];
}