You like to independently randomise shapes and positions. If you do this using two spreadsheets then my approach is to pre-load one spreadsheet into a list and then read values from that list during the main trails loop (pointing at the other spreadsheet). This approach is demonstrated in my independent randomisation demo and also used in PM Time. To avoid extra rows in online data files (since the is trials switch doesn’t yet work) I am moving to pre-loading in a code component, which is shown in Trial Switching.