#include <Arduino.h>


#define REDPIN D1
#define GREENPIN D2
#define BLUEPIN D3

#define FADESPEED 5     // make this higher to slow down

void setup()
{


  pinMode(REDPIN, OUTPUT);
  pinMode(GREENPIN, OUTPUT);
  pinMode(BLUEPIN, OUTPUT);


}

void loop()
{

 uint8_t r, g, b;

  // fade from blue to violet
  for (r = 0; r < 255; r++) {
    digitalWrite(REDPIN, r);
    delay(FADESPEED);
  }
  // fade from violet to red
  for (b = 255; b > 0; b--) {
    digitalWrite(BLUEPIN, b);
    delay(FADESPEED);
  }
  // fade from red to yellow
  for (g = 0; g < 256; g++) {
    digitalWrite(GREENPIN, g);
    delay(FADESPEED);
  }
  // fade from yellow to green
  for (r = 255; r > 0; r--) {
    digitalWrite(REDPIN, r);
    delay(FADESPEED);
  }
  // fade from green to teal
  for (b = 0; b < 256; b++) {
    digitalWrite(BLUEPIN, b);
    delay(FADESPEED);
  }
  // fade from teal to blue
  for (g = 255; g > 0; g--) {
    digitalWrite(GREENPIN, g);
    delay(FADESPEED);
  }

}