NGA is right. Red, orange and purple stones can be inserted into the red groove, and blue, purple and green stones can be inserted into the blue groove, so that the inserted stones can be rewarded from the groove. In addition, the seven-color reward calculation algorithm of orange, purple and emerald is that one piece tops two pieces and it is an emerald. It is not only a yellow stone, but also a blue stone. Similarly, orange and purple are the same, and mottled stones are very helpful for rewarding the trough. 12 method is stronger than 10 intelligence, and it is called glow amethyst, which is an orange stone. 10 intelligence MP5*5 is called dazzling eye of Zur, which is a green stone.