Look inside to see what it's doing... Otherwise this is a REALLY boring project! This is an example of 3 linked elements being stored in a single list rather than 3, so if you had an object with an x, y and z instead of having x, y and z lists you just need one list and a couple of custom blocks to push and pull data to them... There's comments in the code of how to change it to whatever size you want, but I felt 3 was complex enough to show it's usage and simple enough not to confuse! I've created blocks to wrap what's going on "under the hood" and make it simple to use.