Need help making the Glowing effect clientside only

For some reason, I can't post a screenshot of my code im using because it has to have a url.

Goes like this:

[Start]

If is provided world remote (client-side) {

for each entity as entity iterator at X Y Z in a square cube size 64;

if not entity iterator = Event/target entity{

add potion level 1 for 60 ticks to entity iterator type GLOWING;

}

}