Huzzah!

It’s time to write your first code on arduino!

Please do ask if you have any problems regarding anything(well except the purpose of life).

Download it by clicking the following links

Arduino Blink Program Pdf

Arduino Blink Program Pptx

Here is the code

*
Blinking program
Turns on an LED on for two second, then off for one second, repeatedly.

Er. Sahil khanna
https://www.sahilkhanna.org/blog
*/
// Pin 8 has an LED connected
// give it a name:
int led = 8;

// Button is connected to Pin 2
int button = 2;

// Declare some variables. We'll see what we gonna do to them, later.
int val=1;
int check=0;

// the setup routine runs once when you press reset:
void setup() {
Serial.begin(9600);
// initialize the digital button pin as an input.
pinMode(button, INPUT);
// initialize the digital led pin as an output.
pinMode(led, OUTPUT);
}

void blink() {
digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level)
delay(200); // wait for a second
digitalWrite(led, LOW); // turn the LED off by making the voltage LOW
delay(200); // wait for a second
}

// the loop routine runs over and over again forever:
void loop(){
val=digitalRead(button); //reading values from button and saving it in the val variable.

if(val==0){
check=~check; //if button is pressed then compliment the value of check.
delay(500);
}

if(check==-1)
blink(); // blink only if the value of check is one.

}