TranscriptI hope you've had fun while learning about electronics and programming! Let's summarize what you've learned so far. First of all, you created a circuit to light up an LED and went through some basic stuff about electricity, like voltage, current and resistance. You moved on to light up an LED by programming. You made a circuit using a programmable pin and used the pinMode and digitalWrite commands to get this done. You also learned to upload the program to the board. While refining your program you learned to use the delay command to time events. This way you got to blink an LED. You experienced in practice how the loop function repeats actions, and you also got to use the setup section where you define the basic settings that are not repeated. You probably made some mistakes in your code, as well, and learned it's not a big deal. Mistakes happen to everyone and fixing bugs is an important skill, too. In the end you did a final exercise. Either you connected more LEDs and programmed traffic lights, or you made observations to find materials and objects that work well with LEDs. Both of those exercises let you practice useful skills but the point of view was a bit different. And so it should be. There's just so many different ways to work with Arduino and I'm really happy if you find your own way and come up with projects that you like the best!