Connecting the UI to explosions

In the preceding movie, we configured our bubble message … to constantly face the scene camera wherever it's rotated. … And that's really great for displaying messages … and always being able to see them. … Right now, we have just one message, "left ventricle." … But of course, we're going to want to add more … to view the right ventricle … and potentially other parts of the heart. … Now, we don't want those messages … all to show on screen at the same time. … That could be horribly confusing. … Instead, I'm going to create a system where … only one message is shown at any one time. … The idea here is that we have the "left ventricle" message. … When we left-click on that message or when we tap … on that message, I want it to disappear … and to show the next message. … And when we tap on that, it's going to show … the next one, and so on, in a complete sequence of messages. … To start configuring this, I want to set up … the left ventricle object that we have here in the scene. … I'm going to make sure we have selected this object. …