How to create "Success" note/s?

How do you creat the "Success" note or the rainbow notes in the editor? shown on the pic https://snag.gy/MfHG7r.jpg
I know iv seen this in scores and its possible to make in the Editor and im very curios how do you make them

This script:
https://projectdxxx.me/script/index/id/0edba61f78712fe0777140aaa7e564d4

ow cool

So how do i use it now ?

Open script editor

Edit how many notes for success effect (1, 2, 3, 4, etc)

Default leave false for GOOD/COOL for success effect

Where exactly is this script editor case i cant find it anywhere do you mean ScriptManeger?

Sorry for the extremely stupid questios but i have no idea how to make it work still ;-;

Yes script manager