int led_green=9;
 int led_yellow=10;
 int led_red=11;
 int sensorPin =A5; 
void setup()
{
int j;
for(j=9;j<=11;j++)
{
  pinMode(j,OUTPUT); 
}
}
void loop()
{
  int sensorValue;
 
  while(1)
  {
    sensorValue=analogRead(sensorPin);
    
    printf("sensorValue=%d\n", sensorValue);
    
    if(sensorValue>248&&sensorValue<372)
    {
      digitalWrite(led_green,HIGH);
      printf("I am here");
      digitalWrite(led_yellow,LOW);
      digitalWrite(led_red,LOW);
      }
    else if(sensorValue>=372&&sensorValue<496)
  {
  digitalWrite(led_yellow,HIGH);
digitalWrite(led_green,LOW);
digitalWrite(led_red,LOW);
}
else
{
  digitalWrite(led_red,HIGH);
  digitalWrite(led_yellow,LOW);
  digitalWrite(led_green,LOW);
  }
  }
  }