opening the door

at 75 I have slowed a bit in both memory and eyesight so this game has got me so frustrated tryig to remember the sequence of the large gems but it goes so quickly Ikeep getting an "oops try again message" I dont know whether it is worth trying some more

Try again. Try writing down the sequence as you solve it - since it just repeats the first part before adding another color, it's easy to keep track.