Square LED Chaser

A square LED chaser is a fascinating electronics project. Here's a simple guide to get you started:

Components Needed:
1. Arduino Board (e.g., Arduino Uno)
2. LEDs (16-20 LEDs, depending on the design)
3. Resistors (16-20 resistors, 220-1kΩ each)
4. Breadboard
5. Jumper Wires
6. Power Source (e.g., USB cable or battery)

Circuit Diagram:
1. Connect the LEDs to the breadboard in a square pattern.
2. Connect each LED to a resistor and then to the Arduino board's digital pins.
3. Connect the power source to the Arduino board.

Arduino Code:
1. Define the pin connections for the LEDs.
2. Create a function to turn on and off the LEDs in a chasing pattern.
3. Use a loop to repeat the chasing pattern.

Example Code:
```
c++
const int rows = 4;
const int cols = 4;

int ledPins[rows][cols]

Tips and Variations:
1. Adjust the delay time to change the speed of the chasing pattern.
2. Add more LEDs to create a larger square pattern.
3. Use different LED colors to create a colorful chasing pattern.
4. Add a button or sensor to control the chasing pattern.

Remember to follow proper safety precautions and use common sense when working with electronics. Happy building!