const int pinR = 3;
const int pinG = 5;
const int pinB = 6;

const int btn1 = 8;
const int btn2 = 9;

int now = 0;

int colours [7][3] = {{255, 0, 0}, {0, 0, 255}, {0, 255, 0}, {255, 255, 255}, 
{255, 100, 0}, {255, 0, 255}, {255, 0, 100}};


void setup() {
  pinMode(pinR, OUTPUT);
  pinMode(pinG, OUTPUT);
  pinMode(pinB, OUTPUT);

  pinMode(btn1, INPUT_PULLUP);
  pinMode(btn2, INPUT_PULLUP);

  //Serial.begin(9600);
}

void loop() {
  analogWrite(pinR, colours[now][0]);
  analogWrite(pinG, colours[now][1]);
  analogWrite(pinB, colours[now][2]);

  if(!digitalRead(btn1)){
    now--;
    if(now == -1) now = 6;
    //Serial.println(now);
    delay(200);
  }
  else if(!digitalRead(btn2)){
    now++;
    if(now == 7) now = 0;
    //Serial.println(now);
    delay(200);
  }
}