sunrise to sunset from timing sketch

//sunrise to sunset from timing sketch

#define FASTLED_INTERNAL
#include <FastLED.h>
#include <Wire.h>


#define NUM_LEDS 6
#define DATA_PIN 6
#define am1 7
int am1state = 0;
uint16_t currentPixel = 0;
uint16_t led = 0;
byte maxBrightness = 150;

//----------PALETTES-----------

DEFINE_GRADIENT_PALETTE (am_gp) {       // 0000 TO 1200
  0, 0, 0, 0,                                  //black
  18, 0, 0, 0,                               //dark red
  56, 161, 83, 0,                             //orange
  115, 212, 202, 0,                           //dark yellow
  179, 255, 253, 213,                          //bright yellow
  255, 255, 255, 255,                          //white
};

DEFINE_GRADIENT_PALETTE (pm_gp) {    // 1200 To 0000
  0, 255, 255, 255,                          //white
  18, 255, 253, 213,                          //bright yellow
  56, 212, 202, 0,                           //dark yellow
  115, 161, 83, 0,                             //orange
  179, 98, 0, 0,                               //dark red
  255, 0, 0, 0 ,                                 //black}
};

CRGBPalette16 myPal1 = am_gp;
CRGBPalette16 myPal2 = pm_gp;


struct CRGB leds[NUM_LEDS];
static uint8_t paletteIndex = 0;

//------------SETUP-------------

void setup() {
  FastLED.addLeds<WS2811, DATA_PIN, RGB>(leds, NUM_LEDS);
  pinMode(am1, INPUT);
}

//------------LOOP-------------

void loop() {

    amCycle();
    FastLED.show();
    pmCycle();
  FastLED.show();
}

//Functions------------------------------

void amCycle()
{
  CRGB colour = ColorFromPalette(myPal1, paletteIndex, maxBrightness, LINEARBLEND);
  fill_solid(leds, NUM_LEDS, colour);

  EVERY_N_MILLISECONDS(1000) {
    if (paletteIndex < 255) {
      paletteIndex++;
    }
    if (paletteIndex == 255) {
      paletteIndex = 0;
    }
  }
}

//*****************************************
void pmCycle()
{
  CRGB colour2 = ColorFromPalette(myPal2, paletteIndex, maxBrightness, LINEARBLEND);
  fill_solid(leds, NUM_LEDS, colour2);
  EVERY_N_MILLISECONDS(1000) {
    if (paletteIndex < 255) {
      paletteIndex++;
    }
   if (paletteIndex >= 255) {
     paletteIndex = 0;
    }
  }
}