This is a blinking LED activity as the intro for Arduino Code programming.

Arduino is both software and hardware. Right there, you can control the design.

There are two built-in functions in Arduino Code: void setup and void loop.

void setup is where you tell the computer whether an electronic component being programmed is an output device. Other initial setup can be done here, like, the initial mode of an LED is turned on.

void loop is where the execution of programs happen.

Take note of the word void. A void type of function will simply execute all the commands and will not return any value. Other functions which are not void can return values.

You need an 3 basic LEDs, 1 breadboard and the Arduino UNO board.

Follow the wiring as indicated in the picture below:

Then, go to Code section and copy the initial code below: