old_contents: from discord.ext import commands
  import asyncio
  
  class Remind(): #Allow to welcome new members who join server. If it enable, will send them a message.
      def __init__(self,bot):
          self.bot = bot
  
      @commands.command()
      async def remindme(self,time,*,message=""):
          time = time.split(":")
          remind_time = 0
          msg = ""
          if len(time) == 3:
              if int(time[0]) >=5:
                  msg = "It is gonna be over 5 hours, which may not work anymore."
                  msg += "\nTime set {} hours {} minute {} second".format(time[0],time[1],time[2])
              remind_time += int(time[0])*3600 + int(time[1])*60+ int(time[2])
          elif len(time) == 2:
              remind_time += int(time[0])*60 + int(time[1])
              msg = "Time set {} minute {} second".format(time[0],time[1])
          else:
              msg = "Time set {} second".format(time[0])
              remind_time += int(time[0])
  
          await self.bot.say(msg,delete_after=30)
          await asyncio.sleep(remind_time)
          if not message:
              message = "you was remind for something."
          else:
              message = "You was remind for this ```fix\n{}\n```".format(message)
          await self.bot.reply(message,delete_after=30)
          print(message)
  
  def setup(bot):
      bot.add_cog(Remind(bot))
new_contents: from discord.ext import commands
  import asyncio
  
  class Remind(): #Allow to welcome new members who join server. If it enable, will send them a message.
      def __init__(self,bot):
          self.bot = bot
  
      @commands.command(hidden=True)
      async def remindme(self,time,*,message=""):
          time = time.split(":")
          remind_time = 0
          msg = ""
          if len(time) == 3:
              if int(time[0]) >=5:
                  msg = "It is gonna be over 5 hours, which may not work anymore."
                  msg += "\nTime set {} hours {} minute {} second".format(time[0],time[1],time[2])
              remind_time += int(time[0])*3600 + int(time[1])*60+ int(time[2])
          elif len(time) == 2:
              remind_time += int(time[0])*60 + int(time[1])
              msg = "Time set {} minute {} second".format(time[0],time[1])
          else:
              msg = "Time set {} second".format(time[0])
              remind_time += int(time[0])
  
          await self.bot.say(msg,delete_after=30)
          await asyncio.sleep(remind_time)
          if not message:
              message = "you was remind for something."
          else:
              message = "You was remind for this ```fix\n{}\n```".format(message)
          await self.bot.reply(message,delete_after=30)
          print(message)
  
  def setup(bot):
      bot.add_cog(Remind(bot))
subject: Set Remindme command hidden, so it is like easter eggs xD