When you enter the game you will see this.
In the middle of the screen, without the labels. To start you can just roll your mouse pointer over the quadrants and watch the pretty colors. You will notice that clicking and double clicking on a quadrant does different things and both of those different from just putting your pointer on the queadrant. You can also play with the buttons at the bottom. If you don't want any more challenge that's all there is to it. Hit the Let's play button below.
However if you want a challenge, when you have done that, can you get them all back to red again without using the reset button. To do that you will have to carefully note what each pointer movement, click and double click does. At first it appears to have no order but it does have an order. Note: If you want to get from one quadrant to another without making any changes be sure to go round the outside. If you need help then clck on the HELP. Allow yourself one reset to make sure you have started at the beginning once you have understood how to play. Of course you can have as many resets as you like, there is no limit. Have fun.