PC Can't seem to get Souls Of Night

[VilkasKettu]

I have watched 1 video and looked up on terraria wiki that put meteorite in corruption (Patched) and then putting 200 Blocks in the cave area where there is that stone background so I did farm ebonstone blocks and put 200 blocks and there didn't come any Souls Of Night for me and the background didn't change. How can I get souls of night so I can craft the spawning item for The Destroyer? Any other tips that might work?

[EDIT]
Oh yeah and there was this hallowed background before and after placing some ebonstone blocks the background did change to normal from that hallowed cave background.

[EDIT 2]
Ok after 40 minutes I found a place that was very secret underground.

 

[Unit One]

I have watched 1 video and looked up on terraria wiki that put meteorite in corruption (Patched) and then putting 200 Blocks in the cave area where there is that stone background so I did farm ebonstone blocks and put 200 blocks and there didn't come any Souls Of Night for me and the background didn't change. How can I get souls of night so I can craft the spawning item for The Destroyer? Any other tips that might work?

[EDIT]
Oh yeah and there was this hallowed background before and after placing some ebonstone blocks the background did change to normal from that hallowed cave background.

[EDIT 2]
Ok after 40 minutes I found a place that was very secret underground.

The easiest way is go down until you’re almost in the underworld, and in an area that already has corruption. Kill enemies and some will drop souls of night.

Here is an image from google with the area circled in red.