저번에 알려주신 사이트 참조해서 만들었습니다. 
 
센서 두개 개별로 사용하여 인식시 led가 10초동안 켜지고 다시 처음으로 리셋하는 코딩인데 한쪽 센서가 작동을 안합니다 이유가 뭔가요?
 
#define TRIG 2
#define ECHO 3
#define TRIG1 4
#define ECHO1 5
#define RED 11
#define GREEN 10
#define BLUE 9
int distance;
int distance1;
void setup(){
  pinMode(TRIG,OUTPUT);
  pinMode(ECHO,INPUT);
  pinMode(TRIG1,OUTPUT);
  pinMode(ECHO1,INPUT);
}
void loop(){
  digitalWrite(TRIG, LOW);
  digitalWrite(TRIG1, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG, HIGH);
  digitalWrite(TRIG1, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG, LOW);
  digitalWrite(TRIG1, LOW);
  long distance = pulseIn (ECHO, HIGH)/58.2;
  long distance1 =pulseIn (ECHO1, HIGH)/58.2;
  analogWrite(RED,0);
    analogWrite(GREEN,0);
      analogWrite(BLUE,0);
      if(distance<5){analogWrite(RED,255); distance = 4;
      delay (10000);
      return;
      
     if (distance1<5){analogWrite(10,255); distance1 = 4;
      delay (10000);
      return;

      }      }}
 
그리고 시리얼 모니터에 거리도 띄우게 하고싶은데 코드는
 int trigPinTop = 12;
int echoPinTop = 11;
 
int trigPinBot = 8;
int echoPinBot = 9;
 
int cntStair=0;
int cntWall=0;
 
long durationTop, distanceTop, durationBot, distanceBot;
 
void checkBarrier(int distanceTop, int distanceBot);
void initVal();
 
void setup() {
  Serial.begin (9600);
  pinMode(trigPinTop, OUTPUT);
  pinMode(echoPinTop, INPUT);
  pinMode(trigPinBot, OUTPUT);
  pinMode(echoPinBot, INPUT);
 
 
}
void loop() {
 
  digitalWrite(trigPinTop, LOW); // Added this line
  delayMicroseconds(2); // Added this line
  digitalWrite(trigPinTop, HIGH);
  delayMicroseconds(10); // Added this line
  digitalWrite(trigPinTop, LOW);
 
  durationTop = pulseIn(echoPinTop, HIGH);
 
  digitalWrite(trigPinBot, LOW);
  delayMicroseconds(2); // Added this line
  digitalWrite(trigPinBot, HIGH);
  delayMicroseconds(10); // Added this line
  digitalWrite(trigPinBot, LOW);
  durationBot = pulseIn(echoPinBot, HIGH);
 
  distanceTop = (durationTop/2)/29.1;
  distanceBot = (durationBot/2)/29.1;
 
  checkBarrier(distanceTop, distanceBot);
  delay(500);
}
 
 
void checkBarrier(int distanceTop, int distanceBot)    // 1 : not, 2 : stair, 3: wall
{
  // For the ocha
  
  Serial.print(distanceTop);
  Serial.print("  ");
  Serial.println(distanceBot);
  
  
  
  if(distanceTop >= 100 && distanceBot >= 90)    // non barrier
  {
    initVal();
  }
  else if(distanceTop >= 90)        // Stair
  {
        if(cntStair == 0)
    {
    initVal();
    }
    
    cntStair++;
    if(cntStair == 3)
        {
        Serial.println('b');
        initVal();
        }
    
  }
  else                              // wall
  {
    if(cntWall == 0)
    {
    initVal();
    }
    
    cntWall++;
    if(cntWall == 3)
        {
        Serial.println('a');
        initVal();
        }
    
  }
 
}
void initVal()
{
  cntStair =0;
  cntWall = 0;
}
 
이런식으로 하던데 루프 안에 led를 출력을 넣어도 출력이 되질 않네요 어디다 넣어야되는건가요?