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int LEDRpin = 3;
int LEDGpin = 5;
int LEDBpin = 6;
void setup() {
pinMode(LEDRpin, OUTPUT);
pinMode(LEDGpin, OUTPUT);
pinMode(LEDBpin, OUTPUT);
analogWrite(LEDRpin, 0);
analogWrite(LEDGpin, 0);
analogWrite(LEDBpin, 0);
void loop() {
for(int i=0; i<256; i++) {
analogWrite(LEDRpin, i);
for(int i=255; i>0; i--) {
analogWrite(LEDRpin, i);
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