Ever wanted to make your helmet disappear and reappear constantly? Neither have I, but here it is... MagicHelmet. With 0 customizable options, this add-on is great for everyone. It's great for arenas and it's only 665 bytes!
if ShowingHelm() then ShowHelm(0);else ShowHelm(1);end;
if ShowingHelm() then ShowHelm(0) else ShowHelm(1) end