void setup()
{
      Serial.begin(9600); 
      pinMode(9,OUTPUT);
      pinMode(8,INPUT);
  for(int i=2;i<=7;i++) 
  pinMode(i, OUTPUT);

}
void loop()
{
digitalWrite(9,1); 
delay(1);
digitalWrite(9,0);

int sure=pulseIn(8,1);
int mesafe=(sure/2)/28.97;

Serial.print("Olculen Mesafe="); 
Serial.println(mesafe);

if(mesafe<20)
{
  digitalWrite(2,1);
  digitalWrite(2,0);
  delay(50);
  digitalWrite(3,1); 
  digitalWrite(3,0); 
  delay(50);
  digitalWrite(4,1);   
  digitalWrite(4,0); 
  delay(50);
  digitalWrite(5,1); 
  digitalWrite(5,0); 
  delay(50);
  digitalWrite(6,1); 
  digitalWrite(6,0); 
}
  if(mesafe>=20 && mesafe<=40)
  {
  digitalWrite(2,1);
  digitalWrite(2,0);
  delay(150);
  digitalWrite(3,1); 
  digitalWrite(3,0); 
  delay(150);
  digitalWrite(4,1);   
  digitalWrite(4,0); 
  delay(150);
  digitalWrite(5,1); 
  digitalWrite(5,0); 
  delay(150);
  digitalWrite(6,1); 
  digitalWrite(6,0); 
  }
  if(mesafe>=40 && mesafe<=60)  
  {
  digitalWrite(2,1);
  digitalWrite(2,0);
  delay(500);
  digitalWrite(3,1); 
  digitalWrite(3,0); 
  delay(500);
  digitalWrite(4,1);   
  digitalWrite(4,0); 
  delay(500);
  digitalWrite(5,1); 
  digitalWrite(5,0); 
  delay(500);
  digitalWrite(6,1); 
  digitalWrite(6,0); 
  }
if(mesafe>=60)
{

  digitalWrite(2,0);
  delay(500);
  
  digitalWrite(3,0); 
  delay(500);
  
  digitalWrite(4,0); 
  delay(500);
 
  digitalWrite(5,0); 
  delay(500);
 
  digitalWrite(6,0); 
}

delay(1);
}