#define PIN_LED_RED 7
#define PIN_LED_GELB 8
#define PIN_LED_GRUN 9

void setup() 
{
pinMode(PIN_LED_RED, OUTPUT);
pinMode(PIN_LED_GELB, OUTPUT);
pinMode(PIN_LED_GRUN, OUTPUT);
}

void loop() 
{
digitalWrite(PIN_LED_RED, HIGH);
delay(5000);
digitalWrite(PIN_LED_GELB, HIGH);
delay(2000);
digitalWrite(PIN_LED_GRUN, HIGH);
digitalWrite(PIN_LED_GELB, LOW);
digitalWrite(PIN_LED_RED, LOW);
delay(5000);
digitalWrite(PIN_LED_GRUN, HIGH);
delay(2000);
digitalWrite(PIN_LED_GRUN, LOW);
digitalWrite(PIN_LED_GELB, LOW);
}