Double click the green flag ...Which is a programming feature that, when clicked, will start all scripts in that project that are hatted with the When Green Flag Clicked block. More simply, this block starts the project. Offline, pressing the ↵ Enter key on a keyboard will also start all green flag scripts, when not prompted for input by the Ask () and wait block. Also, when ⇧ Shift clicking the green flag, Turbo Mode will be activated, and Ctrl clicking will mute the project so that the project cannot produce any sound (⌘ click on a Mac). https://wiki.scratch.mit.edu/wiki/Green_Flag
