If you are planning to join our Zoom crafting meeting this Wednesday, this is what I suggest you have on hand to do the technique.
Background stamp, stamped with Versamark and heat embossed on watercolor paper. I would suggest a pattern that has plenty of open space. I practiced on Hero Arts Four Leaf Grid, to give you an idea. If you have several ready, you will be good in case of accidents or good to make several backgrounds!
Also acrylic blocks, Water mister and Distress Inks (or any dye inks) in either a rainbow of colors of analogous colors.
NOTE: Zoom sometimes uses a lot of battery power, so have your phone, device or computer charged up enough!