script.js

var _ = require('lodash');

var array = [1,2,3,4,5,6,7,8];
console.log('answer', _.without(array, 6));

var css = document.querySelector("h3");
var color1 = document.querySelector(".color1");
var color2 = document.querySelector(".color2");
var body = document.getElementById("gradient");

function setGradient() {
    body.style.background = 
    "linear-gradient(to right, " 
    + color1.value 
    + ", " 
    + color2.value 
    + ")";

    css.textContent = body.style.background + ";";
}

color1.addEventListener("input", setGradient);

color2.addEventListener("input", setGradient);