Hello! I need help with an automatic spider spawner

[Derpy_Fighter]

Hello there, Im preety new to the forums so sorry about my english / if I did something worng.
I need help.
I want to make an automatic spuder spawner for string.
any Ideas how I make one?
If you have any youtube videos that would be great. Thanks.

Derpy_Fighter.

 

[Derpy_Fighter]

Btw. I have an Iron Rank in the game, Why dont i have "iron" title in here?