In this project, there is a concept block called "offline?", and it has an opposite functionality of the "online?" block. To see the "offline?" block, click the block to change itself.
As you might know, @ScratchCat just announced a new block on Scratch, it's called "online?". https://scratch.mit.edu/discuss/topic/863853/ The "online?" block is a boolean block that is in the Sensing block category. Its functionality is checking if you have internet or not. For example, if you have internet, it'll say true, otherwise it'll say false. Why this block exists? Well, some Scratchers wanted to find a way to do that before, so they used blocks that requires internet to work (like "Translate" extension blocks). So the Scratch developers decided to create a block that has the functionality like this. What do you think about this block? Let me know! :)