/*
  Practical 1 
  modified 16/7/2025
  by azhan@psp


 Write your Group info bellow:-
 Name :
 Matrik:
  
*/
//output pin 
// constants won't change. They're used here to set pin numbers:
const int LED_1_RED = 10 ;//  the number of the LED pin 10
const int LED_2_GREEN = 9 ;//  the number of the LED pin 9
const int LED_3_YELLOW = 8 ;//  the number of the LED pin 8
const int relay1 = 7 ;//  the number of the LED pin 8
//input pin 
// constants won't change. They're used here to set pin numbers:
const int sw1_green =  3;      // the number of the pushbutton pin 3
const int sw2_red =  4;      // the number of the pushbutton pin 4


//int for bit register
int system_status = 0 ; // flag status
int status_sw1=0;
int status_sw2=0;

void setup() {
    // put your setup code here, to run once:
  // initialize the LED pin as an output:
  pinMode(LED_1_RED, OUTPUT);
  pinMode(LED_2_GREEN, OUTPUT);
  pinMode(LED_3_YELLOW, OUTPUT);
  pinMode(relay1, OUTPUT);
  
  // initialize the pushbutton pin as an input:
  pinMode(sw1_green, INPUT);
  pinMode(sw2_red, INPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
//blinker codes

 digitalWrite(LED_3_YELLOW, HIGH);
 delay(250);
 digitalWrite(LED_3_YELLOW, LOW);
 delay(250); 


 //control codes
  status_sw1 = digitalRead(sw1_green);
  status_sw2 = digitalRead(sw2_red);


if ( status_sw1==HIGH ){
  system_status=1;
}

 if ( status_sw2==HIGH ){
  system_status=0;
}

if ( system_status==1){
  digitalWrite(LED_2_GREEN, HIGH);
  digitalWrite(LED_1_RED, LOW);
  digitalWrite(relay1, HIGH);
}
if ( system_status==0){
  digitalWrite(LED_2_GREEN, LOW);
  digitalWrite(LED_1_RED, HIGH);
  digitalWrite(relay1, LOW);
}

  
}