Basic setup for Arduino with Relay

/* 
 * Credits to all sources on Google and Youtube, acting as reference to this code below. This code is not 
 * TechValer's own creation. TechValer has referred to different projects and websites to 
 * find an easy code for beginners to get started with Relay and Arduino.
 * TechValer does not claim this code to be its own. TechValer is greatly thankful for original 
 * creaters of this code and also all others who acted as reference. 
 */

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/*
 * Thanks to Drona Automations Pvt.Ltd for Sponsoring this project!
 */
 
int Relaypin= 3; // Define input pin for relay

void setup() {
  // put your setup code here, to run once:
pinMode(Relaypin, OUTPUT); // Define the Relaypin as output pin
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(Relaypin, HIGH); // Sends high signal 
delay(1000); // Waits for 1 second
digitalWrite(Relaypin, LOW); // Makes the signal low
delay(1000); // Waits for 1 second
}