<script type="text/javascript"> //First we need to initiate the variables that contain the strings:
            var firstString = "This is the first string. ";
            var secondString = "This is the second string. ";
            var thirdString = "This is the third string. ";
          </script>
          <p>This string was made with a regular HTML paragraph element</p>
          <p>Strings stored as variables can be called using document.write:</p>
          <script type="text/javascript">
            document.write(firstString); //this uses the variable 'firstString' to write that string to the page
            document.write("<br>") //this just inserts a line break
            document.write(secondString + " This uses concatenation to write the contents of a variable as well as this string.");
            document.write("<br>");
            document.write(secondString + thirdString); //You can also concatenate two variables.
          </script>