I want to replica Google home page with search box and all functionality. Please help me. Thank in advance

See more:

CSS

HTML

  <div class="sbutt">
     <a   href="#" 
    title="Add To Cart" 
  onclick="this.href='https://www.google.co.in/search?site=webhp&source=hp&q='+document.getElementById('gs').value;somefunction(this, event); return true;"> <input class="myButton" id="t" name="sbut" type="submit" value="Google Search"></a>
  <input class="myButton" name="fl" type="button" value="I'm Feeling Lucky">
        
<br>
<br>
</div>

What I have tried:

I done front end design and google search will done when I click button. But I need function as when is press enter key in text box it will navigate to google search with text inside text box.