Two balls

import tkinter as tk
import math
import random

# Кол-во шариков
BALL_COUNT = 500

# Диапазоны параметров
SPEED_RANGE = (1, 5)
RADIUS_RANGE = (5, 20)
COLORS = ["red", "green", "blue", "orange", "purple", "cyan", "magenta"]

# Окно и холст
root = tk.Tk()
root.geometry("800x600")
root.title("Тысяча мячиков")
canvas = tk.Canvas(root, bg="white")
canvas.pack(fill=tk.BOTH, expand=True)

# Цель — положение мыши
target_x = 300
target_y = 200

def update_target(event):
    global target_x, target_y
    target_x = event.x
    target_y = event.y

canvas.bind("<Motion>", update_target)

# Один шарик: координаты, радиус, скорость, цвет и ID на canvas
balls = []

for _ in range(BALL_COUNT):
    r = random.randint(*RADIUS_RANGE)
    x = random.randint(r, 800 - r)
    y = random.randint(r, 600 - r)
    color = random.choice(COLORS)
    speed = random.uniform(*SPEED_RANGE)
    ball_id = canvas.create_oval(x - r, y - r, x + r, y + r, fill=color, outline="")
    balls.append({"x": x, "y": y, "r": r, "speed": speed, "id": ball_id})

# Изменение цвета случайного шарика при клике
def change_random_color(event):
    ball = random.choice(balls)
    new_color = random.choice(COLORS)
    canvas.itemconfig(ball["id"], fill=new_color)

canvas.bind("<Button-1>", change_random_color)

# Обновление положения шариков
def move_balls():
    for ball in balls:
        dx = target_x - ball["x"]
        dy = target_y - ball["y"]
        dist = math.hypot(dx, dy)

        if dist > 1:
            step_x = ball["speed"] * dx / dist
            step_y = ball["speed"] * dy / dist
            ball["x"] += step_x
            ball["y"] += step_y
            r = ball["r"]
            canvas.coords(ball["id"],
                          ball["x"] - r, ball["y"] - r,
                          ball["x"] + r, ball["y"] + r)
    root.after(16, move_balls)

move_balls()
root.mainloop()