Adding functionality to our app

Now that we have all of the parts of our app into place, let’s work on making the parts interact and work with one another. As a reminder, there are two main functionalities that we want to control with this app. We will want to draw on the canvas, if we click and drag on it, and with the left side of the screen, we will want to change the color we draw with. Let’s start with setting the color, because after all, before we can draw we will have to set the color