Got side to side not up and down thats makes it un even also not too hard very light you need to take your time and at least part at a time ok :)
Well i know the greeks and romans used black backgrounds for their vases but i dont know if that is what you are looking for
this is something you should look up instead of posting on a learning platform
Answer:
Umm, what is that even? I have no idea lol
