<div class="main-box">
  <div class="slider-cont">
    <div class="signup-slider">
      <div class="img-txt">
        <div class="img-layer"></div>
        <h1>The hardest part of starting up is starting out for you.</h1>
        <img src="https://static.pexels.com/photos/33972/pexels-photo.jpg"/>
      </div>
      <div class="img-txt">
        <div class="img-layer"></div>
        <h1>We understand you and your business, We have the right solutions for you.</h1>
        <img src="https://static.pexels.com/photos/257897/pexels-photo-257897.jpeg"/>
      </div>
      <div class="img-txt">
        <div class="img-layer"></div>
        <h1>Join US Now!</h1>
        <img src="https://static.pexels.com/photos/317383/pexels-photo-317383.jpeg"/>
      </div>
    </div>
  </div>
  
  
  <div class="form-cont">

    <div class="top-buttons">
      <button class="to-signup top-active-button">
        Sign Up
      </button>
      <button class="to-signin">
        Sign In
      </button>
    </div>
    
    <div class="form form-signup">
      <form action="#">
        <lable>FULL NMAE</lable>
        <input type="text" 
               placeholder="Your full name">
        <lable>E-MAIL</lable>
        <input type="email" 
               placeholder="Your e-mail">
        <lable>PASSWORD</lable>
        <input type="password" 
               placeholder="Your password">
        <p class="terms">
          <input type="checkbox">
          I agree all statments in 
          <a href="#" class="lined-link">terms of service</a>
        </p>
        <input type="submit"
               class="form-btn"
               value="Sign Up"/>
        <br><br>
        <a href="#" class="lined-link to-signin-link">I'm already member</a>
      </form>
    </div>

    <div class="form form-signin">
      <form action="#">
        <lable>E-MAIL</lable>
        <input type="email" 
               placeholder="Your e-mail">
        <lable>PASSWORD</lable>
        <input type="password" 
               placeholder="Your password">
        <input type="submit"
               class="form-btn"
               value="Sign In"/>
        <br><br>
        <a href="#" class="lined-link to-signup-link">Create new account</a>
      </form>
    </div>
  </div>
  <div class="clear-fix"></div>
</div>
@import url('https://fonts.googleapis.com/css?family=Roboto:100,300,400,700');



/************ Start Main Rules **************/
*{
  margin: 0;
  padding: 0;
  outline: none;
  box-sizing: border-box;
/*   font-family: 'Roboto', sans-serif; */font-family: 'Raleway', sans-serif;
}

body{background: #191919  }

.main-box{
  position: relative;
  display: block;
  width: 90%;
  height: 700px;
  margin: 50px auto;
  border-radius: 8px;
  overflow: hidden;
  background:linear-gradient(to right, #232f41, #374a62);
}

.lined-link{
  position: relative;
  text-decoration: none;
  transition: all 0.2s linear
}

.lined-link:hover{
  opacity: 0.5
}

.lined-link:after {
  position: absolute;
  content: "";
  width: 100%;
  left: 0;
  bottom: -2px;
  border: none;
  border-bottom: 1px solid #63d5c4;
}

/************ Start Slider Container **************/
.slider-cont,
.form-cont{
  width: 50%;
  height: 100%;
  float: left;
}

.slick-slide,
.slick-slider{
  width: 100%;
  height: 100% 
}

.clear-fix{
  clear: both;
}

.slick-dots {
  position: absolute;
  bottom: 10px;
  display: block;
  width: 100%;
  padding: 0;
  list-style: none;
  text-align: center;
}

.slick-dots li {
  position: relative;
  display: inline-block;
  width: 20px;
  height: 20px;
  margin: 0 3px;
  padding: 0;
  cursor: pointer;
}
.slick-dots li button {
  font-size: 0;
  display: block;
  width: 10px;
  height: 10px;
  padding: 5px;
  cursor: pointer;
  border: 0;
  outline: none;
  background: #8dffea;
  border-radius: 50%;
  transition: all 0.3s ease;
}

.slick-dots li.slick-active button{
  background-color: #53C5B9;
  transform: scale(1.6);
  box-shadow: 0 0 10px #1b1b1b
}

.img-txt{
  position: relative;
}

.img-layer {
  position: absolute;
  width: 100%;
  height: 100%;
  background: rgba(47, 63, 85, 0.53);
}

.img-txt h1{
  position: absolute;
  display: block;
  top: 50%;
  color: #fff;
  width: 100%;
  padding: 50px 0;
  font-size: 45px;
  font-weight: 100;
  text-align: center;
  transform: translateY(-50%);
  background-color: transparent;
}

/************ Start Form Container **************/

.top-buttons {
  position: relative;
  display: block;
  width: 100%;
  height: 15%;
  padding: 25px;
  text-align: right;
}

.top-buttons button {
  color: #cacaca;
  border: none;
  width: 90px;
  margin: -2px;
  padding: 10px;
  font-size: 16px;
  font-weight: 300;
  background: #4c5c72;
  cursor: pointer;
}

.top-buttons button:nth-child(1) {
  border-radius: 50px 0 0 50px;
}

.top-buttons button:nth-child(2) {
  border-radius: 0 50px 50px 0;
}

.top-active-button {
  color: #fff !important;
  box-shadow: 0 0 20px #2a2a2a;
  background: linear-gradient(#68dac7,#54c7ba) !important;
  transition: all 0.3s ease;
}

.form{
  width: 100%;
  height: 85%;
  padding: 10px 40px;
}

.form form {
  width: 100%;
  height: 100%;
}

.form form 
lable,
input[type="text"],
input[type="email"],
input[type="password"] {
  display: block;
}

.form form lable {
  color: #fff;
  font-size: 16px;
  font-weight: 300;
  margin: 6px 0;
}

p.terms {
  color: #9E9E9E;
  margin-bottom: 60px;
}

.form form 
input[type="text"],
input[type="email"], 
input[type="password"] {
  color: #fff;
  width: 100%;
  border: none;
  font-size: 16px;
  font-weight: 200;
  margin-bottom: 45px;
  padding: 5px 0 10px 0;
  background: transparent;
  border-bottom: 1px solid #4c5c72;
}

.form form input::placeholder{
  color: #cecece;
}

.form form a {
  color: #fff;
}

input.form-btn {
  color: #fff;
  font-size: 18px;
  font-weight: 300;
  padding: 12px 55px;
  margin-right: 20px;
  border: none;
  cursor: pointer;
  border-radius: 35px;
  transition: all 0.3s linear;
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.55);
  background: linear-gradient(to right, #5bcdbe,#41ab9e);
}

input.form-btn:hover{
  box-shadow: none
}

.form-signin{
  display: none;
  padding-top: 120px;
}
$(document).ready(function(){
  $('.signup-slider').slick({
    dots: true,
    arrows: false,
    autoplay: true,
    autoplaySpeed: 2000
  });

  $("img").height($(".main-box").height());

  $(".to-signin").on("click", function () {
    $(this)
      .addClass("top-active-button")
      .siblings()
      .removeClass("top-active-button");
    $(".form-signup").slideUp(500);
    $(".form-signin").slideDown(500);
  });

  $(".to-signup").on("click", function () {
    $(this)
      .addClass("top-active-button")
      .siblings()
      .removeClass("top-active-button");
    $(".form-signin").slideUp(500);
    $(".form-signup").slideDown(500);
  });

  $(".to-signin-link").on("click", function () {
    $(".to-signin")
      .addClass("top-active-button")
      .siblings()
      .removeClass("top-active-button");
    $(".form-signup").slideUp(200);
    $(".form-signin").slideDown(200);
  });

  $(".to-signup-link").on("click", function () {
    $(".to-signup")
      .addClass("top-active-button")
      .siblings()
      .removeClass("top-active-button");
    $(".form-signin").slideUp(200);
    $(".form-signup").slideDown(200);
  });
});

External CSS

  1. https://cdn.jsdelivr.net/jquery.slick/1.6.0/slick.css

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js
  2. https://cdn.jsdelivr.net/jquery.slick/1.6.0/slick.min.js