#include <FastLED.h>



#define NUM_LEDS 20

#define DATA_PIN 2

#define COLOUR_ORDER GRB

#define CHIPSET WS2812

#define BRIGHTNESS 50

#define VOLTS 5

#define MAX_AMPS 500



CRGB leds[NUM_LEDS];



const int buttonPin = 5; // Button pin



void setup() {

//FastLED.addLeds<NEOPIXELS, DATA_PIN, COLOUR_ORDER>(leds, NUM_LEDS);
FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);


//FastLED.setMaxPowerInVoltsAndMilliamps(VOLTS, MAX_AMPS);

//FastLED.setBrightness(BRIGHTNESS);

FastLED.clear(true);

FastLED.show();
Serial.begin(115200);
Serial.println("init");

}

int lastButtonState = 0;
long lastChanged = 0;
int buttonState = 0;

void loop() {

int count = 50;
again:
int newstate = digitalRead(buttonPin); // Reads the state of the button
if (newstate != buttonState && count-- > 0) goto again;
buttonState = newstate;


for (int i = 0; i < NUM_LEDS; i++) {
  if (buttonState == HIGH) {
   leds[i] = CRGB::Red;
  } else {
   leds[i] = CRGB::Green;
  }

}


FastLED.show();

}