In [[k6 (tool)|k6]], you can use [[Dynamic think time in js]] to create a think time that varies randomly between set values: ```js sleep(Math.random() * 4); ``` ## Random int between There is also an available function called `randomIntBetween()` in the k6 js library, which makes sure that the number returned is an integer between two other integers. To use it, first import the function: ```js import { randomIntBetween } from "https://jslib.k6.io/k6-utils/1.0.0/index.js"; ``` Then, use it in the script like this: ```js sleep(randomIntBetween(1,5)); ``` The line above will cause a delay from 1 to 5 seconds, inclusive.