12V LED strip on Arduino with IRF530N Mosfet transistors - Arduino for beginners

int Secunde = 5;

#define RED 9
#define GREEN 10
#define BLUE 11

void setup()
    {
      pinMode(RED, OUTPUT);
      pinMode(GREEN, OUTPUT);
      pinMode(BLUE, OUTPUT);

      Secunde = Secunde * 100;
    }

void loop()
    {
     STARTRGB();
     STOPRGB();
    }
`
    void STOPRGB()
    {
      digitalWrite(GREEN, LOW);
      delay(Secunde);
      digitalWrite(RED, LOW);
      delay(Secunde);
      digitalWrite(BLUE, LOW);
      delay(Secunde);
    }
    void STARTRGB()
    {
      digitalWrite(RED, HIGH);
      delay(Secunde);
      digitalWrite(GREEN, HIGH);
      delay(Secunde);
      digitalWrite(BLUE, HIGH);
      delay(Secunde);
    }