I just want a static effect to last 30 seconds

[Truls27995341xyka]

So since Premire pro removed Venetian Blinds, I need that effect to add to my time line.

So I'm trying to make it in after effects, I make the blinds as I want to, but they only last a fraction of a second and then it just goes white.  I've never used after affects before, But I just want the effect to stay put for 30 seconds to I can add it as a layer on my premire pro proejct

[Kyle Hamrick]

There's too many variables to guess at what you might be running into, but I have to assume there's some misunderstanding  on your end about how After Effects functions and/or layers in the timeline actually work. 

There's a free introductory After Effects course available from Adobe here: https://adobevideotraining.com/after-effects/introductory-courses/

Hopefully that'll get you some basic understanding of what might be happening.

And/or - post some screenshots or screen recordings of what you're encountering, and we'll be able to better assist you. Please show the entire interface, ideally with your layer(s) twirled open in the timeline.