10秒钟后如何为不和谐的Python发送消息

Question

import discord
import datetime
from discord.ext import commands, tasks

TOKEN = 'token'

client = discord.Client()

    @tasks.loop(seconds=10)
    channel = client.get_channel('channel id')
    async def sendmessage():
         await channel.send("hello")

    sendmessage.start()


    client.run(TOKEN)

所以这是我当前的程序，我不明白为什么当前不起作用