int pin=3;
int pos=0;
int val=0;
void setup(){
  pinMode(pin,OUTPUT);
  pinMode(2,OUTPUT);

}
void loop()
{
 val=digitalRead(13);
 if(val>0)
 {
  analogWrite(pin,70);
  digitalWrite(2,HIGH);
 }
 if(val==0)
 {
  analogWrite(pin,180);
  digitalWrite(2, LOW);
 }
}