float ti; // time 1
float di; // distance2


float t; // time 
float d; // distance

void setup()
{
    pinMode(2,OUTPUT); //trig2
    pinMode(3,INPUT);  //echo2

    pinMode(6,OUTPUT); //trig1
    pinMode(7,INPUT);  //echo1

    pinMode(10,OUTPUT);// led2
    pinMode(11,OUTPUT);// led

    Serial.begin(9600);
}

void loop()
{   

   ulta();
   ultai();
    

        
}

void ulta()
{
    digitalWrite(2,LOW);
    delayMicroseconds(2);

    digitalWrite(2,HIGH);
    delayMicroseconds(10);

    digitalWrite(2,LOW);

    t = pulseIn(3,HIGH);
    d = t*0.017;

    delay(100);

    if(d>4 && d<100)
    {
      analogWrite(10,150);
    }
    
    else
    {
      analogWrite(10,LOW);
    }

}

void ultai()
{
    digitalWrite(6,LOW);
    delayMicroseconds(2);

    digitalWrite(6,HIGH);
    delayMicroseconds(10);
    
    digitalWrite(6,LOW);

    ti = pulseIn(7,HIGH);
    di = ti*0.017;


    delay(100);
    
    if(di>60 && di<120)
    {
      analogWrite(11,150);
    }

    else
    {
      digitalWrite(11,LOW);
    }
}