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CSS

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HTML

              
                <div class="wrapper">
  <div id="wizard" class="wizard">
    <div class="wizard__content">
      <header class="wizard__header">
        <div class="wizard__header-overlay"></div>
        
        <div class="wizard__header-content">
          <h1 class="wizard__title" >Get start with Javascript!</h1>
          <p class="wizard__subheading">Start with <span>3</span> simple steps.</p>
        </div>
        
        <div class="wizard__steps">
          <nav class="steps">
          <div class="step">
            <div class="step__content">
              <p class="step__number"><i class="fa fa-github-alt"></i></p>
              <svg class="checkmark" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 52 52">
                <circle class="checkmark__circle" cx="26" cy="26" r="25" fill="none"/>
                <path class="checkmark__check" fill="none" d="M14.1 27.2l7.1 7.2 16.7-16.8"/>
              </svg>

              <div class="lines">
                <div class="line -start">
                </div>

                <div class="line -background">
                </div>

                <div class="line -progress">
                </div>
              </div>  
            </div>
          </div>

          <div class="step">
            <div class="step__content">
              <p class="step__number"><i class="fa fa-book"></i></p>
              <svg class="checkmark" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 52 52">
                <circle class="checkmark__circle" cx="26" cy="26" r="25" fill="none"/>
                <path class="checkmark__check" fill="none" d="M14.1 27.2l7.1 7.2 16.7-16.8"/>
              </svg>

              <div class="lines">
                <div class="line -background">
                </div>

                <div class="line -progress">
                </div>
              </div> 
            </div>
          </div>

          <div class="step">
            <div class="step__content">
              <p class="step__number"><i class="fa fa-group"></i></p>
              <svg class="checkmark" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 52 52">
                <circle class="checkmark__circle" cx="26" cy="26" r="25" fill="none"/>
                <path class="checkmark__check" fill="none" d="M14.1 27.2l7.1 7.2 16.7-16.8"/>
              </svg>

              <div class="lines">
                <div class="line -background">
                </div>

                <div class="line -progress">
                </div>
              </div> 
            </div>
          </div>
        </nav>
        </div>
      </header>
      
      
      <div class="panels">
        <div class="panel">
            <header class="panel__header">
              <h2 class="panel__title">Create a Github account</h2>
              <p class="panel__subheading">With github you can show your projects and find new things everyday!</p>
            </header>
           
           <p class="panel__content">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna culpa qui officia deserunt mollit anim id est laborum.</p>
          
          <p class="panel__content">Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
        </div>

        <div class="panel">
           <header class="panel__header">
              <h2 class="panel__title">Learn more about pure Javascript.</h2>
              <p class="panel__subheading">We have cool frameworks, but none is better then VanillaJS</p>
           </header>
          
           <p class="panel__content">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna culpa qui officia deserunt mollit anim id est laborum.</p>
           <p class="panel__content">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna culpa qui officia deserunt mollit anim id est laborum.</p>
        </div>

        <div class="panel">
          <header class="panel__header">
            <h2 class="panel__title">Stay in touch with the community.</h2>
            <p class="panel__subheading">Community is everything, and here we do some crazy stuff.</p>
           </header>
          
          <p class="panel__content">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna culpa qui officia deserunt mollit anim id est laborum.</p>
        </div>
      </div>

      <div class="wizard__footer">
      <button class="button previous">Previous</button>
      <button class="button next">Next</button>
    </div>
    </div>
    
    <h1 class="wizard__congrats-message">
      Congratulations, you are now in a world of pain and suffering!
    </h1>
  </div>
</div>


              
            
!

CSS

              
                // Variables
$background-color: #F7F8FA;

$main-color: #4D637B;
$main-black: #676767;
$main-gray: #c3c3c3;

$secondary-color: #75b2f5;
$secondary-color-variant: #5094de;

$default-padding: 15px;
$big-padding: 30px;
$huge-padding: 50px;

$wrapper-size: 1080px;
$wizard-size: 620px;

$circle-size: 40px;
$line-height: 6px;
$default-border-radius: 5px;

$animation-time: .5s;
$curve: cubic-bezier(0.650, 0.000, 0.450, 1.000);
$background-url: 'http://cdn-image.travelandleisure.com/sites/default/files/styles/1600x1000/public/1444253482/DG2015-paris.jpg?itok=XH81cBH9';

// Page 
body, html{
  padding: 0;
  margin: 0;  
  background: $background-color;
  font-family: 'Lato', sans-serif;
  color: $main-black;
}

// General classes
.wrapper{
  position: relative;
  max-width: $wrapper-size;
  margin: 50px auto;
}

// Wizard
.wizard{
  max-width: $wizard-size;
  margin: 0 auto;
  
  &__header{
    position: relative;
    color: #FFF;
    padding: $huge-padding;
    border-radius: $default-border-radius;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    text-align: center;
    height: 100px;
    
    background: url($background-url);
    background-color: $main-color;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
  }
  
  &__header-content{
    position: absolute;
    width: 100%;
    padding: 0 $huge-padding;
    text-align: center;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -60%);
  }
  
  &__header-overlay{
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background: rgba($main-color, 0.6);
    border-top-left-radius: 5px;
    border-top-right-radius: 5px;
  }
  
  &__title{
    font-size: 1.5rem;
    line-height: 2rem;
    margin: 0;
  }
  
  &__subheading{
    text-transform: uppercase;
    margin: 0;
    font-size: .8rem;
    font-weight: 100;
    letter-spacing: 2px;
    
    span{
      font-weight: 600;
    }
  }
  
  &__steps{
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    transform: translateY(50%);
    z-index: 10;
  }
  
  &__footer{
    padding: 0 $huge-padding $huge-padding;
    border-radius: $default-border-radius;
  }
  
  &__content{
    background: #FFF;
    box-shadow: 0px 0px 10px #c5c5c5;
    border-radius: $default-border-radius;
  }
  
  &__congrats-message{
    color: $main-black;
    text-align: center;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    
  }
  
  &.completed{
    .wizard__content{
      animation: gettingOut 2s cubic-bezier(1,-0.71, 1, 1.16) forwards;
    }
    
    .wizard__congrats-message{
      animation: fadeIn 2s cubic-bezier(1,-0.71, 1, 1.16) forwards;
    }
  }
}

// Lines
.line{
  position: absolute;
  top: $circle-size / 2;
  left: 50%;
  z-index: -1;
  height: $line-height;
  transition: all $animation-time ease;
  
  &.-start{
    left: 0%;
    background: $secondary-color-variant;
    width: 50%;
  }
  
  &.-end{
    left: 50%;
    background: $secondary-color-variant;
    width: 50%;
  }
  
  &.-background{
    background: $main-gray;
    width: 100%;
  }
  
  &.-progress{
    background: $secondary-color-variant;
    width: 100%;
    transform: scaleX(0);
    transform-origin: left center;
  }
  
  &.-in-progress{
    transform: scaleX(1);
  }
}

// Panels
.panels{
  position: relative;
  overflow: hidden;
}

.panel{
  position: absolute;
  top: 0;
  left: 0;
  transition: .5s all;
  padding: $huge-padding;
  
  &__header{
    margin-bottom: $big-padding;
  }
  
  &__title{
    font-size: 1.5rem;
    line-height: 2rem;
    margin: 0;
  }
  
  &__subheading{
    font-size: .9rem;
    line-height: 1.2rem;
    margin: 0;
  }
 
  &.movingOutBackward{
    transform: translateX($wizard-size * -1);
  }
  
  &.movingOutFoward{
    transform: translateX($wizard-size);
  }
  
  &.movingIn{
    transform: translateX(0);
  }
}

// Steps
.steps{
  position: relative;
  display: flex;
  flex: 0 1 auto;
  color: #fff;
}

.step{
  flex-basis: 0;
  flex-grow: 1;
  max-width: 100%;
  box-sizing: border-box;
  text-align: center;
  border-radius: 5px;
  
  &__content{
    position: relative;
    z-index: 2;
  }
  
  &__number{
    font-size: 1.3rem;
    color: $main-black;
    background: #FFF;
    font-weight: 800;
    width: $circle-size;
    height: $circle-size;
    line-height: $circle-size;
    margin: 0 auto;
    border-radius: 50%;
    border: 5px solid $main-gray;
    
    transition: opacity .5s;
    opacity: 1;
    z-index: 5;
  }
  
  &.-completed{
    .step__number{
      opacity: 0;
    }
    
    .checkmark{
      z-index: 0;
      animation:  fill .4s ease-in-out forwards, 
                  scale .3s ease-in-out .6s both;
    }
    
    .checkmark__check {
      animation: stroke .5s linear .4s forwards;
    }
    
    .line{
      transform: scaleX(1);
    } 
  }
  
  &:last-child{
    .line{
      width: 50%;
    }
  }
}

// Checkmark
.checkmark {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: $circle-size + 10px;
  height: $circle-size + 10px;
  border-radius: 50%;
  stroke-width: 2;
  stroke: #fff;
  stroke-miterlimit: 10;
  box-shadow: inset 0px 0px 0px $secondary-color;
  z-index: -1;
  
  &__circle {
    stroke-dasharray: 166;
    stroke-dashoffset: 166;
    stroke-width: 8;
    stroke-miterlimit: 10;
    stroke: $secondary-color-variant;
    fill: none;
    animation: stroke .6s $curve forwards;
  }
  
  &__check {
    transform-origin: 50% 50%;
    stroke-dasharray: 40;
    stroke-dashoffset: 40;
    stroke: #FFF;
    stroke-width: 5;
  }
}

// Buttons
.button{
  cursor: pointer;
  font-size: 1rem;
  line-height: 1rem;
  background: $secondary-color-variant;
  color: #FFF;
  padding: 10px 15px;
  border: none;
  outline: none;
  display: inline-block;
  transition: all .3s;
  
  &:hover{
    background: lighten($secondary-color-variant, 10%);
  }
  
  &.previous{
    margin-right: 5px;
  }
  
  &.disabled{
    background: $main-gray;
    cursor: default;
  }
}

// Animations
@keyframes stroke {
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes scale {
  50% {
    transform: translateX(-50%) scale3d(1.5, 1.5, 1.5);
  }
  
  100% {
    transform: scale3d(0);
  }
}

@keyframes fill {
  100% {
    box-shadow: inset 0px 0px 0px 30px $secondary-color;
  }
}

@keyframes gettingOut {  
  0%{
    transform: translateY(0%);
  }
  
  30%{
    transform: translateY(100px);  
  }
  
  100%{
    transform: translateY(-200%);
  }
}

@keyframes fadeIn {
  100%{
    opacity: 1;
  }
}
              
            
!

JS

              
                class Steps{
  constructor(wizard){
    this.wizard = wizard;
    this.steps = this.getSteps();
    this.stepsQuantity = this.getStepsQuantity();
    this.currentStep = 0;
  }
  
  setCurrentStep(currentStep){
    this.currentStep = currentStep;
  }
  
  getSteps(){
    return this.wizard.getElementsByClassName('step');
  }
  
  getStepsQuantity(){
    return this.getSteps().length;
  }
  
  handleConcludeStep(){
    this.steps[this.currentStep].classList.add('-completed');
  }
  
  handleStepsClasses(movement){
    if(movement > 0)
      this.steps[this.currentStep - 1].classList.add('-completed');
    else if(movement < 0)
      this.steps[this.currentStep].classList.remove('-completed');  
  }
}

class Panels{
  constructor(wizard){
    this.wizard = wizard;
    this.panelWidth = this.wizard.offsetWidth;
    this.panelsContainer = this.getPanelsContainer();
    this.panels = this.getPanels();
    this.currentStep = 0;
    
    this.updatePanelsPosition(this.currentStep);
    this.updatePanelsContainerHeight();
  }
  
  getCurrentPanelHeight(){
    return `${this.getPanels()[this.currentStep].offsetHeight}px`;
  }
  
  getPanelsContainer(){
    return this.wizard.querySelector('.panels');
  }
  
  getPanels(){
    return this.wizard.getElementsByClassName('panel');
  }
  
  updatePanelsContainerHeight(){
    this.panelsContainer.style.height = this.getCurrentPanelHeight();
  }
  
  updatePanelsPosition(currentStep){
    const panels = this.panels;
    const panelWidth = this.panelWidth;
    
    for (let i = 0; i < panels.length; i++) {
      panels[i].classList.remove(
         'movingIn',
         'movingOutBackward',
         'movingOutFoward'
      );
        
      if(i !== currentStep){
        if(i < currentStep) panels[i].classList.add('movingOutBackward');
        else if( i > currentStep ) panels[i].classList.add('movingOutFoward');
      }else{
        panels[i].classList.add('movingIn');
      }
    }
    
    this.updatePanelsContainerHeight();
  }
  
  setCurrentStep(currentStep){
    this.currentStep = currentStep;
    this.updatePanelsPosition(currentStep);
  }
}

class Wizard{
  constructor(obj){
    this.wizard = obj;
    this.panels = new Panels(this.wizard);
    this.steps = new Steps(this.wizard);
    this.stepsQuantity = this.steps.getStepsQuantity();
    this.currentStep = this.steps.currentStep;
    
    this.concludeControlMoveStepMethod = this.steps.handleConcludeStep.bind(this.steps);
    this.wizardConclusionMethod = this.handleWizardConclusion.bind(this);
  }
  
  updateButtonsStatus(){
    if(this.currentStep === 0)
      this.previousControl.classList.add('disabled');
    else
      this.previousControl.classList.remove('disabled');
  }
  
  updtadeCurrentStep(movement){   
    this.currentStep += movement;
    this.steps.setCurrentStep(this.currentStep);
    this.panels.setCurrentStep(this.currentStep);
    
    this.handleNextStepButton();
    this.updateButtonsStatus();
  }
  
  handleNextStepButton(){   
    if(this.currentStep === this.stepsQuantity - 1){      
      this.nextControl.innerHTML = 'Conclude!';
      
      this.nextControl.removeEventListener('click', this.nextControlMoveStepMethod);
      this.nextControl.addEventListener('click', this.concludeControlMoveStepMethod);
      this.nextControl.addEventListener('click', this.wizardConclusionMethod);
    }else{
      this.nextControl.innerHTML = 'Next';
      
      this.nextControl.addEventListener('click', this.nextControlMoveStepMethod);
      this.nextControl.removeEventListener('click', this.concludeControlMoveStepMethod);
      this.nextControl.removeEventListener('click', this.wizardConclusionMethod);
    }
  }
  
  handleWizardConclusion(){
    this.wizard.classList.add('completed');
  };
  
  addControls(previousControl, nextControl){
    this.previousControl = previousControl;
    this.nextControl = nextControl;
    this.previousControlMoveStepMethod = this.moveStep.bind(this, -1);
    this.nextControlMoveStepMethod = this.moveStep.bind(this, 1);
    
    previousControl.addEventListener('click', this.previousControlMoveStepMethod);
    nextControl.addEventListener('click', this.nextControlMoveStepMethod);
    
    this.updateButtonsStatus();
  }
  
  moveStep(movement){
    if(this.validateMovement(movement)){
      this.updtadeCurrentStep(movement);
      this.steps.handleStepsClasses(movement);
    }else{
       throw('This was an invalid movement');
    }
  }
  
  validateMovement(movement){
    const fowardMov = movement > 0 && this.currentStep < this.stepsQuantity - 1;
    const backMov = movement < 0 && this.currentStep > 0;
    
    return fowardMov || backMov;
  }
}

let wizardElement = document.getElementById('wizard');
let wizard = new Wizard(wizardElement);
let buttonNext = document.querySelector('.next');
let buttonPrevious = document.querySelector('.previous');

wizard.addControls(buttonPrevious, buttonNext);

              
            
!
999px

Console