Help with my code

l would say always think about the process as it is a thing of repetition and you are telling the computer to do that. so let's say you want it to make you a cup of tea. But you give the computer the cup with a teabag and sugar and tell it to add hot water, the next time you want a cup of tea it would be expecting a tea bag and sugar already in the cup so would only add hot water and you end up with hot water instead of a cup of tea. So you need to supply the write information at the right time. l hope this analogy helps.

It didn't work because each loop is meant for a purpose and l would advice to read more about the different loops as they are very important when it comes to programming languages. To be specific with loops in javascript read about them on https://developer.mozilla.org/en-US/docs/Web/JavaScript or the http://www.w3schools.com/js/ .

using the while loop would make all of them have the same color at a particular time with the code above and always set your html variable to an empty string as suggested earlier so you get the code below:

var red = Math.floor(Math.random() * 256 );
var green = Math.floor(Math.random() * 256 );
var blue = Math.floor(Math.random() * 256 );
var rgbColor = 'rgb(' + red + ',' + green + ',' + blue + ')';
var count = 0
var html = " ";
while ( count < 10 ) {
html += '<div style="background-color:' + rgbColor + '">' + count + '</div>';
  count +=1;
}

document.write(html);

l also tweak the code to have count in the HTML written so that l know how many it is outputting. This always helps to debug your code. or you can always use the console.log() method.

The second example is using the for loop as in the video:

var html = " ";
var red ;
var green  ;
var blue ;
var rgbColor;
for ( var i = 0; i < 10; i += 1) {
   red = Math.floor(Math.random() * 256 );
green = Math.floor(Math.random() * 256 );
 blue = Math.floor(Math.random() * 256 );
 rgbColor = 'rgb(' + red + ',' + green + ',' + blue + ')';
html += '<div style="background-color:' + rgbColor + '">' + i +' </div>';

}

document.write(html);