My layouts are all named, "lev1", "lev2", "lev3", etc and I have global variables named "boardlev1", "boardlev2", "boardlev3" which consist of text values. How can I select a global variable based on the layout name? I managed to use %layoutname to build a string for naming for a localstorage file, but I'm not sure how to select an existing global variable with a string.