Mini LED Traffic Light for Arduino and breadboards

Let's learn how to control multiple LEDs using Arduino’s digital outputs and a breadboard. We'll connect some LEDs to the Arduino Uno and compose a simple program to light them up in a pattern. Take a look at the workplane, where I’ll add a breadboard from the components panel. The rows of a solderless breadboard are connected inside, allowing you to connect components by plugging them into the same row as each other. The special long rails along the edges are for easy access to power and ground. It’s a best practice to always connect 5V and ground to these long rails as a starting point for any Arduino circuit. Try it for yourself in Tinkercad Circuits! Double click along the wire to create bends you can use to tidy up your circuit. To change your wire colors, select the color in the inspector, or use the number keys on your keyboard to quickly switch between colors. Wire connections t