While

The while block is a c-shaped block that runs the inverse of the boolean inside it. This block infact is in vanilla Scratch but got removed in the Scratch 3(3.0) update, but is still usable as a hidden block. Turbowarp has added it to their toolbox and so has PenguinMod.
== Workaround ==
This block can be worked around using repeat until <not< >>’. `
Category:Control Blocks
Category:C-Shape Blocks