Here's how Tony described his presentation:
Icons are an extremely effective form of communication. They are simple pictures that are immediately recognizable and universally understood. Icons tend to be simple drawings and are typically one color, making them easy to design if you break them down into shapes. Sure, there are millions of icons you can download, but there are advantages to making them yourself. When you draw your own, you can fill it with any color. And, you can customize your icon—you can change it to exactly meet your needs. Plus, it feels good to be creative with your visuals!