Meet the new Linintel BIOS version, 4.0! My upcoming OSes will be using this new version. Add your OS after this template, and make your OS broadcast "Linintel" when the flag is clicked so that the Linintel BIOS animation will start. In the Linintel sprite, At the end of the code, there is a broadcast block so make sure that you set the broadcast block to broadcast your os to start. So when you press the flag, Linintel will search for a boot device and then boot into your OS. (It will also play the Intel Sound as the BIOS sound!)
Thanks to @ag231264 for making this version of Linintel! This new version has a terminal!!! Press the left arrow to open it. Make sure the terminal applies to your OS.