[Bug]: Animation was deleted without rendering anything about matplotlib HOT 1 OPEN

import numpy as np
import matplotlib.pyplot as plt
from matplotlib.animation import FuncAnimation
import csv


# Initialize empty lists to store data
x_vals = []
sensorValue1_data = []

# Create a function to read and process data from Arduino
def read_and_process_data():
    xn = len(x_vals)+1
    x_vals.append(xn)
    sensorValue1_data.append(np.sin(xn))
    print("read done")


# Create a function to update the plot
def update_plot(frame):
    read_and_process_data()
    plt.cla()
    plt.plot(x_vals, sensorValue1_data, label='Sensor 1')
    plt.xlabel('Time')
    plt.ylabel('distance')
    plt.legend()

# Create a function to save data to a CSV file when the plot window is closed
def on_close(event):
    print("write, write, write")

# Register the callback function for when the plot window is closed
fig, ax = plt.subplots()
fig.canvas.mpl_connect('close_event', on_close)

ani = FuncAnimation(fig, update_plot, interval=1)
plt.show()