// use the FastLED library (someone's pre-written code)
#include <FastLED.h>
const int NUM_LEDS = 30;
const int DATA_PIN = 12;
CRGB leds[NUM_LEDS];

void setup() {
  FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
  FastLED.setMaxPowerInVoltsAndMilliamps(5,400);
  FastLED.setBrightness(8);
  
  pinMode(11, INPUT_PULLUP);
}

void loop() {
  if(digitalRead(11) == LOW){
    startLights();
  }
}

void startLights(){
  for(int i=0; i<30; i++){
    leds[14+i] = CRGB::Red;
    leds[15-i] = CRGB::GreenYellow;
  }
  FastLED.show();
  delay(500);

  for(int i=0; i<30; i++){
    leds[random(30)].setRGB(127*random(3), 127*random(3), 127*random(3));
  }
  FastLED.show();
  delay(500);
  
  for(int i=30; i<2; i++){
  for(int i=random(30); i<30; i++){
    leds[i] = CRGB::White;
    leds[30-i] = CRGB::White;
    leds[i-1] = CRGB::Black;
  }
  FastLED.show();
  delay(500);
  }

  for(int i=0; i<30; i++){
    leds[i] = CRGB::Purple;
    leds[i-1] = CRGB::Black;
    FastLED.show();
    delay(250);
    leds[i] = CRGB::Black;

for(int i=0; i<30; i++){
    leds[30-i] = CRGB::Purple;
    leds[1-i] = CRGB::Black;
    FastLED.show();
    delay(250);
    leds[i] = CRGB::Black;
  }
  FastLED.show(); 
  delay(500);
}

for(int i=0; i<30; i++){
  leds[i] = CRGB::Cyan;
  FastLED.show();
  delay(200);
}
for(int i=0; i<30; i++){
  leds[i].setRGB(127*random(3), 127*random(3), 127*random(3));
}

  for(int i=0; i<5; i++){
    leds[i] = CRGB::Black;
  }
  FastLED.show();
  delay(500);
}