代码：

import random
import time
from math import pi, cos, sin
from tkinter import *

CANVAS_WIDTH = 640  # 画布的宽
CANVAS_HEIGHT = 640  # 画布的高
TREE_COLOR = "#2e8b57"  # 树的颜色
TRUNK_COLOR = "#8b4513"  # 树干的颜色
STAR_COLOR = "#ffff00"  # 星星的颜色
LIGHT_COLOR = "#ff4500"  # 灯光的颜色
BACKGROUND_COLOR = "#000000"  # 背景颜色
TEXT_COLOR = "#ffffff"  # 文字颜色
TEXT_FONT = ('Arial', 24, 'bold')  # 文字的字体

# 圣诞树的大小和位置
TREE_BOTTOM = CANVAS_HEIGHT - 50
TREE_TOP = TREE_BOTTOM - 200
TREE_WIDTH = 200
TRUNK_WIDTH = 40
TRUNK_HEIGHT = 50


def draw_tree(canvas):
    # 树的底部三角形部分
    canvas.create_polygon(
        CANVAS_WIDTH // 2, TREE_TOP,  # 顶部
        CANVAS_WIDTH // 2 - TREE_WIDTH, TREE_BOTTOM,  # 左下角
        CANVAS_WIDTH // 2 + TREE_WIDTH, TREE_BOTTOM,  # 右下角
        fill=TREE_COLOR, outline="green", width=2
    )

    # 树的中部三角形部分
    canvas.create_polygon(
        CANVAS_WIDTH // 2, TREE_TOP + 40,  # 顶部
        CANVAS_WIDTH // 2 - TREE_WIDTH * 0.8, TREE_BOTTOM - 40,  # 左下角
        CANVAS_WIDTH // 2 + TREE_WIDTH * 0.8, TREE_BOTTOM - 40,  # 右下角
        fill=TREE_COLOR, outline="green", width=2
    )

    # 树的顶部三角形部分
    canvas.create_polygon(
        CANVAS_WIDTH // 2, TREE_TOP + 80,  # 顶部
        CANVAS_WIDTH // 2 - TREE_WIDTH * 0.6, TREE_BOTTOM - 80,  # 左下角
        CANVAS_WIDTH // 2 + TREE_WIDTH * 0.6, TREE_BOTTOM - 80,  # 右下角
        fill=TREE_COLOR, outline="green", width=2
    )

    # 树干
    canvas.create_rectangle(
        CANVAS_WIDTH // 2 - TRUNK_WIDTH // 2, TREE_BOTTOM,  # 左上角
        CANVAS_WIDTH // 2 + TRUNK_WIDTH // 2, TREE_BOTTOM + TRUNK_HEIGHT,  # 右下角
        fill=TRUNK_COLOR, outline=TRUNK_COLOR
    )


def draw_star(canvas, x, y, size):
    # 绘制一个星星
    canvas.create_oval(
        x - size, y - size, x + size, y + size,  # 左上角和右下角
        fill=STAR_COLOR, outline=STAR_COLOR
    )


def draw_lights(canvas, x, y, size, color):
    # 绘制一颗灯泡
    canvas.create_oval(
        x - size, y - size, x + size, y + size,  # 左上角和右下角
        fill=color, outline=color
    )


def draw_dynamic_star(canvas, frame):
    # 让星星闪烁
    if frame % 30 < 15:
        draw_star(canvas, CANVAS_WIDTH // 2, TREE_TOP - 40, 15)


def draw_dynamic_lights(canvas, frame):
    # 动态灯泡
    num_lights = 15
    for i in range(num_lights):
        angle = 2 * pi * i / num_lights  # 每个灯泡的位置角度
        x = CANVAS_WIDTH // 2 + (TREE_WIDTH * 0.6) * cos(angle)
        y = TREE_TOP + 80 + (TREE_WIDTH * 0.6) * sin(angle)

        # 每个灯泡随机闪烁
        color = LIGHT_COLOR if random.random() > 0.5 else "black"
        draw_lights(canvas, x, y, 5, color)


def draw_text(canvas):
    # 显示圣诞祝福
    canvas.create_text(CANVAS_WIDTH // 2, CANVAS_HEIGHT - 20, text="Merry Christmas!", fill=TEXT_COLOR, font=TEXT_FONT)


def draw_dynamic_tree(main, canvas, frame):
    # 清空画布
    canvas.delete('all')

    # 绘制圣诞树
    draw_tree(canvas)

    # 绘制闪烁的星星
    draw_dynamic_star(canvas, frame)

    # 绘制动态灯光
    draw_dynamic_lights(canvas, frame)

    # 绘制祝福语
    draw_text(canvas)

    # 设置每帧调用
    main.after(100, draw_dynamic_tree, main, canvas, frame + 1)


if __name__ == '__main__':
    root = Tk()  # 创建一个Tk对象
    canvas = Canvas(root, bg=BACKGROUND_COLOR, height=CANVAS_HEIGHT, width=CANVAS_WIDTH)
    canvas.pack()

    # 动态绘制圣诞树
    draw_dynamic_tree(root, canvas, 0)

    # 启动应用
    root.mainloop()

效果：