issue with text label

If I have a text output in my block and then call a procedure, the procedure will run through first and the textoutput will show after that.
How can I avoid that?

Example:
if get temp = true
set output.text to "Hello"
call Procedure1

For example, "Hello" should come before the "Procedure1".

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The model of event processing in App Inventor by  Lyn

use a clock component

after setting the output text start the clock and inside the clock.timer event stop the clock and call procedure 1

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