Can you remember the symbols on the three cards that Tara gave to you? Can you remember how many flashing orbs there were? If not, then
yes you'll need to go back and redo both these parts.
Here's a step-by-step:
By speaking to Tara, she will give you three cards in turn, and you should make a note of the symbol on each one.
One of the documents in your game package has a circular decoration with similarly shaped symbols. This is the document you use with the plastic spiders. Place one spider on each of the symbols Tara gives you. (Or if you don't have the plastic spiders that came with the game box, just use something else. It's just fun with the spiders. )
By counting how many coloured flashing orbs there are after completing the orb puzzle, you now know how many spaces to rotate the spiders from their original spots.
Make a note of the new symbols after you have clockwise-rotated the plastic spiders.
Those new symbols can now be entered onto the spider box in your inventory.
If you still have problems, let us know.