To view a pattern and reproduce it entirely from memory.

1. Choose a difficulty-level from the top-right menu.

2. Click on "Generate!" to generate a random pattern. If you're not happy with the result, simply click it again.

3. Click on "Start!" to hide the generated pattern, then start rebuilding the pattern in the lower field by toggling on the blocks where you think they belong.

4. Click on "Check!" to find out the results, and to unhide the original pattern so you can compare it with your guess.