There was a thread with the same question just 3 weeks ago... Anyways, LW2904 is reworking a mania bot that works most of the time (It will crash sometimes, so if you want to help, you could report the crashes in ******).
https://******.com/LW2904/maniac
There's also RoKo but it seems to be detected according to the creator, it's more stable than maniac so I'll link it anyway.
https://******.com/rwdkor/RoKo
I hope there's no problem with sending links here...