How to make alarms/overlays?

Hello!
Can someone tell me how to make alarms or like screen overlays? I want a red screen when the alarm is going off and I want it to like blink on/off.

i can help you make an alarm add me in eggo boid >:D

Bruh. Your a dev. You know what this is for XD. Site-19…

Anyone? Help please…

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i can help depending on what kinda alarm u want (if its a outbreak timer then sry i cant help u)

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bruh i cant figure thouse out 2

It’s like the SCP game when there is an alarm. The screen flashes red

ok
New Piskel - 2021-05-21T123526.408

Do you know how???

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rag can yo make my generator now

yes
New Piskel - 2021-05-21T123526.408

rag do you know what a generator is its when i buy item and when placed makes a unit who makes me mony have you ever played 2$:hammer::gem::moneybag:

ik what a generator is cuz i once made a business generator game before i got banned