int redPin = 0;  
int greenPin = 4; 
int bluePin = 5;
int led=23;
int b =0.5;
int Trig_pin =5;
int Echo_pin =18;
long duration;
float Speed_of_sound =0.034;
float dist_in_cm;
void setup() {
    pinMode(redPin, OUTPUT);
      pinMode(greenPin, OUTPUT);
        pinMode(bluePin, OUTPUT);
        pinMode(led, OUTPUT);
        Serial.begin(115200);
Serial.println("LDR readings...");
pinMode(2, INPUT);
 Serial.begin(115200);
     pinMode(Trig_pin, OUTPUT); 
        pinMode(Echo_pin, INPUT);
}
void loop() {
  setColor(255, 0, 0);
  delay(100);
  setColor(0, 255, 0);
  delay(100);
  setColor(0, 0, 255); 
  delay(100);
  setColor(255, 255, 0);
  delay(100);
  setColor(0, 255, 255);
  delay(100);
  setColor(255, 0, 255);
  delay(100);
  setColor(255, 255, 255);
  delay(100);
  digitalWrite(led, HIGH);
delay(b);
digitalWrite(led, LOW);
delay(b);
  int a=analogRead(2);
  Serial.println(a);
  delay(10);
  digitalWrite(Trig_pin, LOW);
  delayMicroseconds(2);
        digitalWrite(Trig_pin, HIGH);
        delayMicroseconds(10);
        digitalWrite(Trig_pin, LOW);
        duration = pulseIn(Echo_pin, HIGH);
        dist_in_cm = duration * Speed_of_sound/2; 
        Serial.print("The distance is 1:"); 
        Serial.println(dist_in_cm); 
        delay(10);
}
void setColor(int redValue, int greenValue, int blueValue) {
  analogWrite(redPin, redValue);
  analogWrite(greenPin, greenValue);
  analogWrite(bluePin, blueValue);
  
}