Please search before you post… (It’s the forums motto! 
)
Boss_1s already explained it, but if you want, here is a guide to explain it further:
Configurable timed lasers (Difficulty: 
) - Community Made Guides - Gimkit Creative
Or this post:
By the way...
I changed the title to fix the spelling of laser (I do NOT like words being incorrectly spelled. Not trying to be mean, just saying… I’m not going to change every single title in the forums though.)
Please mark a solution already.