Just click the flag and hold down the mouse button (that works the flashlight).
I saw a couple of these and tested them out on some of my unshared projects....Couple of them were difficult to do but very interesting. So I decided to post this random duck of a project to test it out XD. Sorry for the random things.. The Background Photo (c) Scott Cawthon for the character and Google to find it. I also credit the person who uploaded it to Google XD. The Flashlight Effect (c) Jen (This was the effect I liked/preferred the most out of my unshared projects X3).