Host a secret chat using Mesh

mesh-chatScratch has a secret feature called Mesh that enables multiple projects to interact with one another via broadcasts and variables. To demonstrate the feature, I’ll show you how to create a simple chat program.

Note: This is not a suitable Scratch 2.0 project, where chat clients are prohibited. But this project is 1.4 based and uses the mesh feature which is designed to work over a local network.

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