Help with periodic skript

[Meatball]

how can i check if a player is online every so often and then with that information change the effect of something.

every 100 ticks
  if player is online:
   #code
  else:
   stop

I know that you can not use every 100 ticks like this i just used this to show what i am trying to do.

 

[novastosha]

1. Save the player in a variable (Not in the every trigger)

2. In the every trigger replace "player" with your variable

 

[Meatball]

1. Save the player in a variable (Not in the every trigger)

2. In the every trigger replace "player" with your variable

I do have the player saved as a variable, still doesn't work
[doublepost=1587923852,1587923711][/doublepost]here is the exact code i am trying to use, right now it only checks once if the player is online, as i have the if player is online before every 100 ticks.

on place of dried kelp block:
  set {owner::%uuid of player%} to player
  if {maxgen::%uuid of player%} is not set:
    set {maxgen::%uuid of player%} to 15
  if {gen::%uuid of player%} >= {maxgen::%uuid of player%}:
    cancel event
    send "&cYou already placed max generators"
  if {gen::%uuid of player%} < {maxgen::%uuid of player%}:
    add 1 to {gen::%uuid of player%}
    send "&7You have placed &c%{gen::%uuid of player%}%&7/&c%{maxgen::%uuid of player%}% &7generators"
  if {owner::%uuid of player%} is online:
    while event-block is dried kelp block:
      wait 100 ticks
      drop 1 kelp above location of event-block
  else:
    stop

but i would like it to check if the player is online every minute then if the player is online it continues with the code.

 

[novastosha]

if {owner::%uuid of player%} is online:

 

[Meatball]

if {owner::%uuid of player%} is online:

What?
that is what i have?

 

[Deleted member 9590]

@Meatball
As I have understod, you just want to check if a player is online, correct?

If so, then simply do as you did

if player is online:
    code