int a=11;
int ac=7;
int led1=6;
int led2=5;
void setup() {
pinMode(a, INPUT);
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
Serial.begin(9600);
}

void loop() {
digitalWrite(a, HIGH);
digitalWrite(a, LOW);
int ac=digitalRead(a);
Serial.println(ac);
if (ac==0)
{digitalWrite(led2, HIGH);
digitalWrite(led1, LOW);
Serial.println("Led2 is on, output is 0");
delay(2000);
}
else
{
digitalWrite(led1, HIGH);
digitalWrite(led2 ,LOW);
Serial.println("Led1 is on, output is 1");
delay(2000);
}
}