I think what you are after is some kind of shader effect
there are plenty of ones people have shared accross the AppGameKit classic forum
that may be like what you want. Otherwise you could just use an animated
sprite with some distorted frames. The animated version is by far the
fastest for older mobile use.
Quote: "
Ide also like to enforce the fact that agk studio forum is for matters regarding the IDE of agk studio
If you have a question please ask it on AppGameKit classic chat. Unless you have a question that is directly
related to AppGameKit studio. At this point of time AppGameKit Studio uses exactly the same engine as classic."
Consider yourself warned and don't repeat posts all across the forums