Find Code at: https://www.elithecomputerguy.com/2020/12/arduino-send-commands-with-serial-communication/
With the Arduino IDE Serial Monitor you can send commands to your Arduino.
Functional Parts in the Project:
Arduino Uno – https://store.arduino.cc/usa/arduino-uno-rev3
560 Piece Jumper Wire Kit – https://amzn.to/2MsCLjL
220 Ohm Resistors – https://amzn.to/2RiiMD9
Breadboard Kit – https://amzn.to/2Xih5ei
LED Kit – https://amzn.to/2Rjhs2N