A pulsing effect for Neopixels

Fade.ino

#include <Adafruit_NeoPixel.h>
#define PIN 6
Adafruit_NeoPixel strip = Adafruit_NeoPixel(16, PIN, NEO_GRB + NEO_KHZ800);

//  Desert - Gold / brown
  uint32_t desert = strip.gamma32(strip.Color(255, 183, 0));
//  Underwater - Deep blues  / dark
  uint32_t water = strip.gamma32(strip.Color(0, 32, 194));
//  Rainforest - Deep greens  / dark
  uint32_t forest = strip.gamma32(strip.Color(0, 179, 116));
//  Grassland - Light greens / yellows
  uint32_t grass = strip.gamma32(strip.Color(234, 255, 143));
//  Beach - Light blues / tans
  uint32_t beach = strip.gamma32(strip.Color(0, 255, 255));
  uint32_t black = strip.gamma32(strip.Color(0, 0, 0));

bool rampUp = false;
bool steady = false;
bool rampDown = false;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
  strip.setBrightness(5);
  pinMode(2, INPUT);

}

void loop() {
    int switchOn = digitalRead(2);
//    Serial.print("rampUp = "); //+ rampUp + " // steady = " + steady + " // rampDown = " + rampDown);
//    Serial.println(rampUp);
//    if(rampUp==false){
//      if(switchOn==HIGH){
//        rampUp=true;
//      }
//    } else { //if rampUp==true
//      if (steady==false){ //if needs to rampUp
//        strip.setBrightness(5);
//        strip.show();
//        for(int i=0; i<strip.numPixels(); i++){
//          strip.setPixelColor(i, forest);
//          strip.show();
//        }
//        delay(40);
//        for(int bright=10; bright<100; bright=bright+5){
//          strip.setBrightness(bright);
//          strip.show();
//          delay(40);
//        }
//        steady = true;
//      }
//      else { //if rampUp has happened and steady state
//        if(switchOn == LOW){ //if switch has turned off
//          rampDown = true;
//          steady = false;
//          rampUp = false;
//        } else {
//          for(int bright=100; bright>50; bright=bright-5){
//            strip.setBrightness(bright);
//            strip.show();
//            delay(40);
//          }
//          for(int bright=50; bright<100; bright=bright+5){
//            strip.setBrightness(bright);
//            strip.show();
//            delay(40);
//          }
//        }
//      }
//    }
//    if(rampDown = true){
//      for(int bright=100; bright>0; bright=bright-5){
//        strip.setBrightness(bright);
//        strip.show();
//        delay(40);
//      }
//      strip.setBrightness(0);
//      strip.show();
//      rampDown = false;
//    }
    if(switchOn==HIGH){
      strip.setBrightness(5);
      strip.show();
      for(int i=0; i<strip.numPixels(); i++){
        strip.setPixelColor(i, forest);
        strip.show();
      }
      delay(200);
      for(int bright=10; bright<100; bright=bright+2){
        strip.setBrightness(bright);
        strip.show();
        delay(200);
      }
      for(int bright=100; bright>0; bright=bright-2){
        strip.setBrightness(bright);
        strip.show();
        delay(200);
      }
      strip.setBrightness(0);
      strip.show();
    }
    
    else{
      for(int i=0; i<strip.numPixels(); i++){
        strip.setPixelColor(i, black);
        strip.show();
      }
    }
//  for(int i=0; i<strip.numPixels(); i++){
//    strip.setPixelColor(i, desert);
//    strip.show();
//  }
//  delay(500);
//  // put your main code here, to run repeatedly:
//  setAllStrips(255,255,255);
//    delay(500);
//  for(int i=50; i>0; i=i-10){
//    strip.setBrightness(i);
//    delay(500);
//  }
}

void setAllStrips(byte red, byte green, byte blue) {
  // for each strip
    // for each pixel
    for (int pixel = 0; pixel < strip.numPixels(); pixel++) {
      strip.setPixelColor(pixel, red, green, blue);
    }
    strip.show(); // Output to strip
 
}

void fadeToBlack(uint32_t color){
  //extract rgb values
  byte r = Red(color);
  byte g = Green(color);
  byte b = Blue(color);
  
  for(int i=0; i<5; i++){
    if(r>0){
      r = r-20;
    }
    if(g>0){
      g = g-20;
    }
    if(b>0){
      b = b-20;
    }
    setAllStrips(r,g,b);
    delay(1000);
  }
}

// Returns the Red component of a 32-bit color
byte Red(uint32_t color)
{
    return (color >> 16) & 0xFF;
}

// Returns the Green component of a 32-bit color
byte Green(uint32_t color)
{
    return (color >> 8) & 0xFF;
}

// Returns the Blue component of a 32-bit color
byte Blue(uint32_t color)
{
    return color & 0xFF;
}