White blocks appear and disappear on the screen; you must remember their locations and touch the blocks that appeared.
It consists of 3 to 14 stages.
The game proceeds sequentially starting from stage 3 when you press the [Start] button. If you make 3 mistakes in a stage (touching the incorrect block 3 times), that stage ends in failure. The test ends if there are a total of 3 stage failures.
The last stage where the test was interrupted is the result. Statistically, it is usually between stages 8 and 12.