Arduino RGB Blinker

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Arduino RGB Zufallsblinker neverending

// int pins + variable
int  LED1 = 10;
int  LED2 = 11;
int  LED3 = 12;
int  LED4 = 13;
int  LED5 = 6;
int  LED6 = 7;
int  LED7 = 8;
int  LED8 = 9;
int rgb;

void setup()
{
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  pinMode(LED5, OUTPUT);
  pinMode(LED6, OUTPUT);
  pinMode(LED7, OUTPUT);
  pinMode(LED8, OUTPUT);
}

void loop()
{
  rgb = (random (1, 7)); // random rgb 1-7
  //  rgb = (0);
  switch (rgb)         // switch rgb 1--7 farbwert
  {
  case 1:
    // gelb
    digitalWrite(LED1,HIGH);
    digitalWrite(LED2,LOW);
    digitalWrite(LED3,HIGH);
    digitalWrite(LED4,LOW);
    digitalWrite(LED5,HIGH);
    digitalWrite(LED6,LOW);
    digitalWrite(LED7,HIGH);
    digitalWrite(LED8,LOW);

    delay(random (50, 250) ); // delay variabel
  //delay(1000)               // delay 1 sec
    break;
  case 2:
    //lila
    digitalWrite(LED1,LOW);
    digitalWrite(LED2,HIGH);
    digitalWrite(LED3,HIGH);
    digitalWrite(LED4,LOW);
    digitalWrite(LED5,LOW);
    digitalWrite(LED6,HIGH);
    digitalWrite(LED7,HIGH);
    digitalWrite(LED8,LOW);

    delay(random (50, 250));
    break;
  case 3:
    // blau
    digitalWrite(LED1,LOW);
    digitalWrite(LED2,HIGH);
    digitalWrite(LED3,HIGH);
    digitalWrite(LED4,HIGH);
    digitalWrite(LED5,LOW);
    digitalWrite(LED6,HIGH);
    digitalWrite(LED7,HIGH);
    digitalWrite(LED8,HIGH);

    delay(random (50, 250));
    break;
  case 4:
    // rot
    digitalWrite(LED1,HIGH);
    digitalWrite(LED2,HIGH);
    digitalWrite(LED3,HIGH);
    digitalWrite(LED4,LOW);
    digitalWrite(LED5,HIGH);
    digitalWrite(LED6,HIGH);
    digitalWrite(LED7,HIGH);
    digitalWrite(LED8,LOW);

    delay(random (50, 250) );
    break;
  case 5:
    // gruen
    digitalWrite(LED1,HIGH);
    digitalWrite(LED2,LOW);
    digitalWrite(LED3,HIGH);
    digitalWrite(LED4,HIGH);
    digitalWrite(LED5,HIGH);
    digitalWrite(LED6,LOW);
    digitalWrite(LED7,HIGH);
    digitalWrite(LED8,HIGH);
    break;
  case 6:
    // tuerkis
    digitalWrite(LED1,LOW);
    digitalWrite(LED2,LOW);
    digitalWrite(LED3,HIGH);
    digitalWrite(LED4,HIGH);
    digitalWrite(LED5,LOW);
    digitalWrite(LED6,LOW);
    digitalWrite(LED7,HIGH);
    digitalWrite(LED8,HIGH);

    delay(random (50, 250) );
    break;
  case 7:
    //weiss
    digitalWrite(LED1,LOW);
    digitalWrite(LED2,LOW);
    digitalWrite(LED3,HIGH);
    digitalWrite(LED4,LOW);
    digitalWrite(LED5,LOW);
    digitalWrite(LED6,LOW);
    digitalWrite(LED7,HIGH);
    digitalWrite(LED8,LOW);

    delay(random (50, 250));
    break;
  default: 
    //off
    digitalWrite(LED1,LOW);
    digitalWrite(LED2,LOW);
    digitalWrite(LED3,LOW);
    digitalWrite(LED4,LOW);
    digitalWrite(LED5,LOW);
    digitalWrite(LED6,LOW);
    digitalWrite(LED7,LOW);
    digitalWrite(LED8,LOW);

    delay(random (50, 250));
  }
}