#define ECHOPIN 8
#define TRIGPIN 9
const int Buzz = A3;
#define pinverd 11
#define pintaronja 12
#define pinvermell 13

void setup() {
  // put your setup code here, to run once:
Serial.begin(115200);
pinMode(TRIGPIN, OUTPUT); 
pinMode(ECHOPIN, INPUT); 
pinMode(pinverd, OUTPUT); 
pinMode(pintaronja, OUTPUT);
pinMode(pinvermell, OUTPUT);
}

void loop() {
   // put your main code here, to run repeatedly:
digitalWrite(TRIGPIN,LOW);
delayMicroseconds(2);
digitalWrite(TRIGPIN, HIGH); 
delayMicroseconds(10);

float temps = pulseIn(ECHOPIN,HIGH);
int distancia = int (temps * 0.0343 / 2);
delay (800);
      Serial.print("distancia en CM: ");
      Serial.println(temps / 58);

if ((distancia<200) & (distancia>101))
    {digitalWrite(pinverd, HIGH);
    digitalWrite(pintaronja, LOW);
    digitalWrite(pinvermell, LOW);
    digitalWrite(Buzz, LOW);
    Serial.print("SEGUR");}
if ((distancia<100) & (distancia>51))
    {digitalWrite(pinverd, LOW);
    digitalWrite(pintaronja, HIGH);
    digitalWrite(pinvermell, LOW);
    digitalWrite(Buzz, LOW);
    Serial.print("COMPTE");}
if ((distancia<50) & (distancia>0))
    {digitalWrite(pinverd, LOW);
    digitalWrite(pintaronja, LOW);
    digitalWrite(pinvermell, HIGH);
    digitalWrite(Buzz, HIGH);
    Serial.print("PERILL");}

delay(500);

}