int bt=2;
int led1=12;
int led2=13;
int bs=0;
int t=600;
void setup() {
  // put your setup code here, to run once:
pinMode(bt,INPUT);
pinMode(led1,OUTPUT);
pinMode(led2,OUTPUT);
attachInterrupt(digitalPinToInterrupt(bt),lr,CHANGE);
}

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

  digitalWrite(led2, HIGH);
delay(t);
digitalWrite(led2,LOW);
delay(t);
}
void lr() {
bs = digitalRead(bt);
if(bs==HIGH)
{
digitalWrite(led1,HIGH);
}
else{
  digitalWrite(led1,LOW);
}



}