The "Repeat Until..." block. Now, before you start running around like crazy how "AHHhh you should put this in a suggestions post", just calm yourself. This is both a suggestion for a future update and a way to mimic this block until it is added.
The idea of "Repeat Until..." is a Control Block in which the blocks inside will be repeated, over and over, until a certain condition is reached, such as a value hitting a certain number. Ex:
Repeat Until Value = 1
Change Color Random
This would be useful as, say, creating a game where something is repeating something over and over until the player dies. Now, until such an idea is available, I have put together the string of code below. The block with the star next to it is the block that will be repeated until the conditions are met.
Change Color Random ️
Check Once If Value = 1
(Optional: Insert an unaffecting block, like set invisibility 0 or set size 100. You don't need anything here, though)
I actually came across this while coding a game, and decided to share this for anyone who may want it. I know the logic is very simple, but hey, it doesn't hurt to just lay it out for you. If requested, I will show pictures.