Interesting practice. Stage 1-Read the practice1 words, say the color of the words. For example, for the word, GREEN, you should say "GREEN." Stage 2-Read the practice2 color, say the color of the words. For example, for the color, BLUE, you should say "BLUE." Stage 3-Read the practice3 words,but you need correct answer the color word names. For example, for the word, BLUE, you should say "GREEN." Give it a try. The article grammar maybe wrong, you can suggest me.