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HTML 

              
                
<div id="leftnav">
            <div id="fblike"><img src="images/fblike.jpg" alt="Facebook Like"></div>
            <p>Title 1</p>
            <nav>
                    <ul>
                    <li><a href="#">Link1</a></li>
                    <li><a href="#">Link2</a></li>
                    <li><a href="#">Link3</a></li>  
                    </ul>
            </nav>
            <p>Title 1</p>
            <nav>
                    <ul>
                    <li><a href="#">Link1</a></li>
                    <li><a href="#">Link2</a></li>
                    <li><a href="#">Link3</a></li>
                    </ul>
            </nav>
            <p>Title 1</p>
            <nav>
                    <ul>
                    <li><a href="#">Link1</a></li>
                    <li><a href="#">Link2</a></li>
                    <li><a href="#">Link3</a></li>
                    </ul>
            </nav>
            <p>This the<a href="#">Link</a></p>
        </div>
        <div id="content"><!--ContentStarts-->
                <h1>The Best Cars in London</h1>
                <p>1 Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed at consectetur orci. Mauris accumsan fermentum turpis, eget tincidunt ligula lacinia quis. Duis vitae metus nec eros congue laoreet. Pellentesque nulla magna, consequat sit amet ligula et, rutrum sagittis lorem. Ut ut ipsum a orci semper porta. Pellentesque nec tellus laoreet, tristique felis non, rutrum magna. Phasellus mollis pretium massa. Interdum et malesuada fames ac ante ipsum primis in faucibus. Nunc mollis facilisis odio. Vestibulum elementum elit magna, eget cursus tellus congue sed. Duis convallis elementum velit, in sodales libero vehicula sit amet.<img src="./images/light.jpg" alt="light"></p>

                <p>2 Sed ipsum dui, pretium a arcu ut, ultrices iaculis neque. Aliquam dictum ut tellus non iaculis. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum interdum libero et purus scelerisque ornare. Nullam a ante tellus. Mauris accumsan egestas eros, ut placerat ligula auctor nec. In nec arcu eros.</p>

                <p>3 Ut dapibus nibh et laoreet sodales. Nullam et felis sed lectus accumsan volutpat. Nullam commodo tincidunt nisl, id posuere velit dapibus vel. Morbi non imperdiet nunc. Vivamus diam eros, semper mattis cursus ut, commodo id mauris. Nullam blandit pulvinar leo id fermentum. Proin ornare diam et erat rutrum, eget egestas nisi aliquet. Etiam urna massa, dapibus quis fermentum vitae, viverra vitae mi.</p>

                <p><strong>Eed ipsum dui, pretium a arcu ut, ultrices iaculis neque.</strong></p>
                <div id="Box"><p>Ut dapibus nibh et laoreet sodales. Nullam et felis sed lectus accumsan volutpat. Nullam commodo tincidunt nisl, id posuere velit dapibus vel. Morbi non imperdiet nunc.</p></div>

                <h2>This second Section of about our company</h2>

                <p>2.1 Sed ipsum dui, pretium a arcu ut, ultrices iaculis neque. Aliquam dictum ut tellus non iaculis. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum interdum libero et purus scelerisque ornare. Nullam a ante tellus. Mauris accumsan egestas eros, ut placerat ligula auctor nec. In nec arcu eros.</p>

                <p>2.3 Sed ipsum dui, pretium a arcu ut, ultrices iaculis neque. Aliquam dictum ut tellus non iaculis. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum interdum libero et purus scelerisque ornare. Nullam a ante tellus. Mauris accumsan egestas eros, ut placerat ligula auctor nec. In nec arcu eros.</p>
            </div><!--ContentEnds-->
        
        <div id="rightnav">
            <div>
                <form>
                    Search<input type="text" name="search"><br>
                    <button>Submit</button>
                </form>
            </div>
            <div><p>Advertise with us.</p></div>
        </div>
        </div>
!

CSS 

              
                #content {
    float: left;
    width: 50%;
    background-color: yellow;
}

 #leftnav {
    width: 25%; 
    float: left;
    background-color: red;
}

 #rightnav {
    width: 25%;
    float: right;
    background-color: blue;
}
!

JS
!
999px

Console