Deleted literally everything

[mikebroe1234]

I went to go delete everything and start over but something went wonky and ended up everything is gone it just has a blue or black screen(cant remeber) when i turn it on and a line of words. How can i fix this

 

[USAFRet]

I went to go delete everything and start over but something went wonky and ended up everything is gone it just has a blue or black screen(cant remeber) when i turn it on and a line of words. How can i fix this

We need a LOT more details on this.

What type of system? PC, phone, tablet, other...
What OS?
How did you try to "delete everything"?
What do you want the end state to be?