#define Trig 10
#define Echo 11
 void setup()
  {
Serial.begin(9600); 
pinMode(Trig,OUTPUT);
 pinMode(Echo,INPUT);
  pinMode(13,OUTPUT);
}
void loop() 
{
long width,distance;
 digitalWrite(Trig,0); 
 delayMicroseconds(2); 
 digitalWrite(Trig,1);
  delayMicroseconds(10);
   digitalWrite(Trig,0); 
   width=pulseIn(Echo,1); 
   distance=width/58.2;
    Serial.print("Distance is:");
 Serial.print(distance);
 Serial.println("cm"); 
  if(distance<10)
digitalWrite(13,1); else
digitalWrite(13,0); delay(1000);
}