How do I get a new screen to pop up?

Im making a game where you can go through a door and a new screen flashes up of a snarling dog animation sequence. However, I can't seem to get the screen to appear. Anyone got any ideas?

What do you mean by screen ? Is it another layout or just an image ?

What do you mean by "you can go through a door" ? Is it a Sprite (player) touching another sprite (door) ? What do you mean ?

Could you post a screenshot of your event sheet or a link to your capx ?

oh, sorry, what i mean is to have the sprite to overlap a door and once you press 'Space' to enter, a cutscene will come onto the screen of a short animation.

As far as I can tell from your question, right now my answer would be:

on spacebar pressed

sprite is overlapping door

play cutscene

Biggest question now is..

What is this cutscene?

Is it a sprite, a new layout, a new layer, a video?

i guess it would be a video aha

Then it would be:

on spacebar pressed

sprite is overlapping door

play video

https://www.scirra.com/manual/181/video