int segnal   = 3;
int ledGreen = 4;
int ledRed   = 5;

void setup()
{
  pinMode( ledGreen, OUTPUT );
  pinMode( ledRed, OUTPUT );

  digitalWrite( ledGreen, LOW );
  digitalWrite( ledRed, LOW );
}

void loop()
{
  int pirSegnal = digitalRead( segnal );
  int pirSegnal2= (pirSegnal == HIGH)? LOW:HIGH;

  digitalWrite( ledGreen, pirSegnal );
  digitalWrite( ledRed, pirSegnal2 );

  delay(100);
}