#define LED_a 
#define LED_b 13
#define PB 3
int state;

void setup()
{
Serial.begin(9600);
pinMode(LED_a, OUTPUT);
pinMode(LED_b, OUTPUT);
pinMode(PB, INPUT_PULLUP);

Serial.println("HELLO");
}
void loop()
{
state=digitalRead(PB);

if(state==HIGH/1)
{
digitalWrite(LED_a, HIGH);
digitalWrite(LED_b, HIGH);
}
else
{
digitalWrite(LED_a, LOW);
digitalWrite(LED_b, LOW);
}
}