int red = 6, blue = 5, green = 3, pb = 8, c = 0;

void setup() {
  pinMode(red, OUTPUT);
  pinMode(blue, OUTPUT);
  pinMode(green, OUTPUT);
  pinMode(pb, INPUT);
}

void loop() {
  int signal = digitalRead(pb); 
  if (signal == 1) {c++;}
  if (c == 1) {
    setcolor(255, 0, 0);
    delay(100);
    setcolor(160, 110, 90);
    delay(100);
    setcolor(200, 70, 190);
    delay(100);
    setcolor(255, 170, 80);
    delay(100);
  } else if (c == 2) {
    setcolor(0, 255, 0);
    delay(100);
    setcolor(60, 210, 50);
    delay(100);
    setcolor(100, 240, 90);
    delay(100);
    setcolor(110, 255, 50);
    delay(100);
  } else {
    setcolor(0, 0, 0);
    delay(200);
    c = 0; 
  }
}

void setcolor(int r, int g, int b) { 
  analogWrite(red, r);
  analogWrite(green, g);
  analogWrite(blue, b);
}