How to make shader affect the screen

[zWSz]

So i wanted this effect on Love2d: https://youtu.be/-Ah8vvXwv5Y
So i tried to ramake it but the effect seems to only affect the image not the screen itself
Soory if im not being clear enough do im going to post the .love here you can see what im talking about
https://www.sendspace.com/file/nmh3nm

Also im on Android Löve v11.3

[zorg]

Hi and welcome to the forums!

For "full screen" shaders you need to draw to a window/screen sized canvas, set the shader and draw the canvas with the shader active, otherwise it'll only affect the area the drawable takes up.