# Are the blocks single threaded? If I run a loop, everything else will wait until that loop ends?
**URL:** https://community.thunkable.com/t/are-the-blocks-single-threaded-if-i-run-a-loop-everything-else-will-wait-until-that-loop-ends/134167
**Category:** Questions about Thunkable X
**Created:** [July 6, 2019, 6:05pm UTC](https://community.thunkable.com/t/are-the-blocks-single-threaded-if-i-run-a-loop-everything-else-will-wait-until-that-loop-ends/134167 "2019-07-06T18:05:30Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@vba](https://community.thunkable.com/u/vba)
#### Post date: [July 6, 2019, 6:05pm UTC](https://community.thunkable.com/t/are-the-blocks-single-threaded-if-i-run-a-loop-everything-else-will-wait-until-that-loop-ends/134167/1 "2019-07-06T18:05:30Z")
Are the blocks single threaded? If I run a loop, everything else will wait until that loop ends?
Thank you in advance!
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### Author:  [@actech](https://community.thunkable.com/u/actech)
#### Post date: [July 6, 2019, 7:08pm UTC](https://community.thunkable.com/t/are-the-blocks-single-threaded-if-i-run-a-loop-everything-else-will-wait-until-that-loop-ends/134167/2 "2019-07-06T19:08:19Z")
Yes, try to start a different process to trigger a timer to simulate multithreading.
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### Author:  [@vba](https://community.thunkable.com/u/vba)
#### Post date: [July 6, 2019, 7:46pm UTC](https://community.thunkable.com/t/are-the-blocks-single-threaded-if-i-run-a-loop-everything-else-will-wait-until-that-loop-ends/134167/3 "2019-07-06T19:46:33Z")
So while one timer is counting down, other stuff happens, and when the timer expires the action gets inserted in the queue, like a JS async call. Is that correct?
Is that timer “Wait X seconds”? Just having that action is enough to start a different process?
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### Author:  [@actech](https://community.thunkable.com/u/actech)
#### Post date: [July 7, 2019, 7:08am UTC](https://community.thunkable.com/t/are-the-blocks-single-threaded-if-i-run-a-loop-everything-else-will-wait-until-that-loop-ends/134167/4 "2019-07-07T07:08:00Z")
“like a JS async call”
Yes
Use the Timer component with a single start. I would not recommend using a delay block “Wait” at all.
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### Author:  [@ioannis](https://community.thunkable.com/u/ioannis)
#### Post date: [November 8, 2024, 12:12pm UTC](https://community.thunkable.com/t/are-the-blocks-single-threaded-if-i-run-a-loop-everything-else-will-wait-until-that-loop-ends/134167/5 "2024-11-08T12:12:19Z")