Now that we have style tags to indicate the area which should be read by the browser as CSS, we can begin writing classes inside of them.

As mentioned, a CSS class starts with a . and is followed by a name (it can be whatever you'd like, as long as it starts with an alphabetical character), then a pair of opening and closing curly brackets.

If I were to make a class whose purpose was to turn text blue, I'd start with a name that resembles what effect the class will have on an HTML element—so something like:

.text-blue {

}

Using the same naming convention above where a color is prefixed by "text," declare a class whose purpose is to turn text green (make sure to include your opening and closing curly brackets).