/* Switches, buzzer and LED

Circuit Connections:
PIN_0 => Resistor 220Ω => Buzzer_Positive - Buzzer_Negative = > Gnd 
PIN_1 => Resistor 220Ω => LED_Anode - LED_Cathode = > Gnd
PIN_8 => Pull down resistor (220Ω) => switch_1 (Vcc)
PIN_9 => Pull down resistor (220Ω) => switch_2 (Vcc)
*/

#define Buzzer_pin 0     //give the name “Buzzer_pin” to PIN_0
#define led_pin 1            //give the name “led_pin” to PIN_1
#define Sw1_pin 8          //give the name “Sw1_pin” to PIN_8
#define Sw2_pin 9          //give the name “Sw2_pin” to PIN_9

//The setup() function initializes and sets the initial values
//It will only run once after each powerup or reset
void setup() {
  //Configure PIN_0 and PIN_1 to behave as output
  //Configure PIN_8 and PIN_9 to behave as input
  pinMode(Buzzer_pin, OUTPUT);
  pinMode(led_pin, OUTPUT);
  pinMode(Sw1_pin, INPUT);
  pinMode(Sw2_pin, INPUT);
}

//This function loops consecutively
void loop() {
  //The Buzzer follows the state of switch_1
  digitalWrite(Buzzer_pin, digitalRead(Sw1_pin));
  //The LED follows the invert state of switch_2
  digitalWrite(led_pin, !digitalRead(Sw2_pin));
}