Containers/Wrappers are Style classes of the div HTML tag.

1. Declaration: the containers should be declared in the HTML header.

    Coding  <style>                                  <!-- A container name may be given satisfying the use of the container -->                                  
             
 name     .name {
                             float: left;
              
size                                                    <!-- Container's Features/Attributes design to specify  size, alignment,  shape , position, and background colour/image. -->
                             width: 97%;
                             height: 250px;
             
shape
                            margin: 5px;
                            padding: 15px;
                            border: 1px solid black;
             
colour
                            background: #ccc;
                            background-image: url(bg_image.jpg);
           
font features/attributes
                            font-size: 11px;
                           font-color: #FFFFFF;
              psition
                           float: left;

                         display: none;
               }

                                                                          <!-- media query may be used to re-declare the containers features/attributes for given device screen size and features -->
                     @media screen and (max-width: 800px) {
                              .name {
                                  f loat: right;
                                 width: 40%;
                                 font-size: 4;
                                 background: #FF0000;
                                 border: 4px solid black;
                                }
                         }

</style>
In the body:

              <div class="name">

                 </div>

             The containers may be positioned directly in a given web page raw, or within a given table/cell. Containers may contain any web materials directly or within inner table/cell.

                Containers occupy their declared position in the given raw page and will be moved automatically to the next raw,  if the width of the screen is less than the total sum of the containers  width size within the specified raw.