How to create Arduino LED 3d printed Christmas Tree Lamp

1#include <FastLED.h>
2#define LED_PIN     5
3#define NUM_LEDS    10
4#define  BRIGHTNESS  64
5#define LED_TYPE    WS2811
6#define COLOR_ORDER GRB
7
8int  OldState [NUM_LEDS];
9int NewState [NUM_LEDS];
10int Color = 145;
11int ColorChange=0;
12unsigned  long timer=0;
13
14
15CRGB leds[NUM_LEDS];
16void setup() {
17    delay( 3000  ); // power-up safety delay
18    FastLED.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(leds,  NUM_LEDS).setCorrection( TypicalLEDStrip );
19    FastLED.setBrightness(  BRIGHTNESS  );
20    for( int i = 0; i < NUM_LEDS-1; ++i) if(Color+random(30)>255) OldState[i]  = Color+random(30);else OldState[i] = Color+random(30)-255;
21}
22
23void loop()  {
24  if (millis()-timer>10000){
25    timer = millis();
26    Color=Color+20;
27    if (Color>255)Color=Color-255;
28  }
29
30  for( int i = 0; i < NUM_LEDS-1;  ++i)  if(Color+random(30)>255) NewState[i] = Color+random(30);else NewState[i] =  Color+random(30)-255;
31  for (int j=0;j<30;j++){
32    for( int i = 0; i < NUM_LEDS-1;  ++i) {
33      if (OldState[i]<NewState[i])ColorChange=1; 
34      if (OldState[i]>NewState[i])ColorChange=-1;
35      OldState[i]=OldState[i]+ColorChange;
36      if (OldState[i]>255)OldState[i]=OldState[i]-255;
37      leds[i] = CHSV(OldState[i], 255, 255);
38      ColorChange=0;
39  }
40    FastLED.show();
41  delay(40);
42  }
43  for( int i = 0; i < NUM_LEDS-1;  ++i) {
44       OldState[i] = NewState[i];
45  }
46  leds[9] = CHSV(Color+100,  255, 255);
47}