constantly run macro

[William]

I've made a macro that opens notepad only if the hour is 4, meaning it could be any time between 4:00 and 4:59.

Code:

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str t
t.time("%I")
if t = 04
    run "notepad.exe"

I want this program to run constantly, and when the hour turns 4, notepad opens. Is there any way to do this?

also, i would like to know if there is any way for it to open if the hour is an odd number.