# Implement different tasks based on session which is written before the running
**URL:** https://discourse.psychopy.org/t/implement-different-tasks-based-on-session-which-is-written-before-the-running/38932
**Category:** Builder
**Created:** [March 3, 2024, 9:00am UTC](https://discourse.psychopy.org/t/implement-different-tasks-based-on-session-which-is-written-before-the-running/38932 "2024-03-03T09:00:34Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Julien](https://discourse.psychopy.org/u/Julien)
#### Post date: [March 3, 2024, 9:00am UTC](https://discourse.psychopy.org/t/implement-different-tasks-based-on-session-which-is-written-before-the-running/38932/1 "2024-03-03T09:00:34Z")
OS: Win11
PsychoPy version : PsychoPy 2023.2.3
My purpose：
1. Design 4 loops, each containing 30 trials, each trial runs the same program but presents different stimuli.
2. The 120 trials, which could have been combined into a single loop, are divided into 4 loops due to participant breaks interspersed between them.
My issue：
1. Participants may exit midway through the experiment, causing subsequent trials to restart from the beginning.
2. I want to use the session provided at the beginning to determine which loop of the trial the participant has left to complete.
What I have done:
as you can see, I intend to assign a Block\_number for each loop, which will be toggled 0/1 based on the session identifier. Consequently, at the beginning of each loop, I can check whether to proceed based on the Block\_number value.
But this cannot work, the program is running as if I hadn’t set any code yet. By the way, I’ve successfully run each loop. I just want to use a control to confirm whether the loop should be executed or not.
So is there any solution or is there a simpler and more efficient way for me to achieve this task?
I’m new to PsychoPy and this forum, so I appreciate any help I can get. Thanks in advance!
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### Author:  [@wakecarter](https://discourse.psychopy.org/u/wakecarter)
#### Post date: [March 3, 2024, 1:07pm UTC](https://discourse.psychopy.org/t/implement-different-tasks-based-on-session-which-is-written-before-the-running/38932/2 "2024-03-03T13:07:10Z")
Which tab have you used? It should be Begin Experiment
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### Author:  [@Julien](https://discourse.psychopy.org/u/Julien)
#### Post date: [March 4, 2024, 2:10pm UTC](https://discourse.psychopy.org/t/implement-different-tasks-based-on-session-which-is-written-before-the-running/38932/3 "2024-03-04T14:10:03Z")
Do I have to put all the code inside ‘Begin Experiment’?
I asked some people, and the response I got was that I can achieve my idea by using code [\.finished = True (Python offline, replace \ to the current loop name) and trials.finished = true (JS online)]
It’s more complex than I anticipated. I feel like this feature doesn’t require overly complicated statements.
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### Author:  [@wakecarter](https://discourse.psychopy.org/u/wakecarter)
#### Post date: [March 4, 2024, 2:50pm UTC](https://discourse.psychopy.org/t/implement-different-tasks-based-on-session-which-is-written-before-the-running/38932/5 "2024-03-04T14:50:45Z")
> [@Julien](#):
>
> I asked some people, and the response I got was that I can achieve my idea by using code [\.finished = True (Python offline, replace \ to the current loop name) and trials.finished = true (JS online)]
It would be better to use nReps to stop the loop starting. trials.finished = True is for ending a loop early