int grunelampe = 10;
int rotelampe = 8;
int gelbelampe =3;
int blauelampe=2;


void setup() 
{
  
  pinMode(10,OUTPUT);
  pinMode(8,OUTPUT);
  pinMode(3,OUTPUT);
  pinMode(2,OUTPUT);

}
 
void loop() 
{
  digitalWrite(rotelampe,HIGH);
  digitalWrite(grunelampe,LOW);
  delay(500);
  digitalWrite(rotelampe,LOW);
  digitalWrite(gelbelampe,HIGH);
  digitalWrite(blauelampe,LOW);
  delay(500);
  digitalWrite(gelbelampe, LOW);
  digitalWrite(grunelampe,HIGH);
  digitalWrite(rotelampe, LOW);
  delay(500);
  digitalWrite(grunelampe, LOW);
  digitalWrite(blauelampe,HIGH);
  delay(500);
  digitalWrite(blauelampe,LOW);


}