Start by importing the necessary libraries:

import network
import socket
from time import sleep

Replace 'Your_SSID' and 'Your_PASSWORD' with your Wi-Fi network's SSID and password:

ssid = 'Your_SSID'
password = 'Your_PASSWORD'

Create a function called 'scan_wifi' that scans for nearby Wi-Fi networks and returns a list of tuples containing the SSID and signal strength (RSSI) of each network:

def scan_wifi():
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    networks = wlan.scan()
    wifi_data = []
    for net in networks:
        ssid = net[0].decode('utf-8')
        rssi = net[3]
        wifi_data.append((ssid, rssi))
    return wifi_data

Create a function called 'webpage' that takes the Wi-Fi data list as an argument and generates an HTML string to display the Wi-Fi signal strength information in a table:

def webpage(wifi_data):
    ... (include the full 'webpage' function code from the provided code snippet)

Create a function called 'serve' that connects the Pico to the Wi-Fi network, starts a web server, and sends the generated HTML string to clients when they connect:

def serve():
    ... (include the full 'serve' function code from the provided code snippet)