int SensorA = 7;
int SensorB = 6;
int SensorC = 5;
int P1 = A0;
int P2 = A1;

void setup() 
{
  pinMode(P1, OUTPUT); 
  pinMode(P2, OUTPUT); 
  pinMode(SensorA, INPUT_PULLUP); 
  pinMode(SensorB, INPUT_PULLUP);
  pinMode(SensorC, INPUT_PULLUP);
}


void loop() {
 if(digitalRead(SensorA) == LOW)  
  {
    digitalWrite(P1, HIGH);
    digitalWrite(P2, HIGH);
  }
 
  if(digitalRead(SensorA) == HIGH && digitalRead(SensorB) == LOW)
  {
    digitalWrite(P2, HIGH); 
    digitalWrite(P1, LOW); 
  }
  
if(digitalRead(SensorB) == HIGH && digitalRead(SensorC) == LOW)
  {
    digitalWrite(P1, HIGH);  
    digitalWrite(P2, LOW);
  }
 
if(digitalRead(SensorC) == HIGH)  
  {
    digitalWrite(P1, LOW);
    digitalWrite(P2, LOW);
  }
}