I'm not really familiar with the Repeat function. However as written I don't think it will ever stop.
You should also read this post Repeat and End Repeat(?)
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I would consider using a "private Boolean" with an additional trigger at 10PM.
If time = 4:00 THEN set private Boolean to true.
end-if
If Boolean = true THEN
blinking code Repeat
end if
If time = 10:00 THE set private Boolean = false
end if
