Sorry this isn't L.O.L, it's actually for a studio soooo... yeah. Umm, the visibility is kinda low so if you can read it then the words are down below.
Credit to @StickTheAwesome for the song! Words: Get a GIF or choose a sprite with a costume. You can hover over a a sprite to see if it has different costumes. As you can see, I chose the dress. Click on the sprite, then click on the "Costumes" tab. You will see each costume of the sprite once you click that tab. Next, you go to you're code and drag these blocks: "Switch Costume to: ________" (How many of costumes you have is how many you should take), "Wait _ seconds" block, you can edit the time to your preferences. And of course your event block (And forever block if you want it). The time in between will vary. Also, on the right side, I put a forever block around the same code to make it happen forever. Now watch your awesome code! Enjoy! BYYYYYYEEEEE!!!