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#define RED_LED 11 // PWM fähiger PIN
#define GRN_LED 10 // PWM fähiger PIN
#define BLU_LED 9  // PWM fähiger PIN
void setup()
{
  pinMode(RED_LED, OUTPUT);
  pinMode(GRN_LED, OUTPUT);
  pinMode(BLU_LED, OUTPUT);
}
void loop()
{
  for (int i = 0; i < 255; i++)
  {
    analogWrite(RED_LED, i); // Den Wert i an RED_LED setzen
    delay(10);
  }
  for (int i = 255; i > 0; i--)
  {
    analogWrite(RED_LED, i); // Den Wert i an RED_LED setzen
    analogWrite(GRN_LED, (-1) * (255 - i)); // Den Wert i umkehren und an GRN_LED setzen
    delay(10);
  }
  for (int i = 255; i > 0; i--)
  {
    analogWrite(GRN_LED, i); // Den Wert i an RED_LED setzen
    analogWrite(BLU_LED, (-1) * (255 - i)); // Den Wert i umkehren und an BLU_LED setzen
    delay(10);
  }
  for (int i = 255; i > 0; i--)
  {
    analogWrite(BLU_LED, i); // Den Wert i an RED_LED setzen
    delay(10);
  }
}