初始状态为待命，数码管熄屏。
按按钮到下一个状态，数码管显示倒计时
倒计时之后等待一段时间led灯亮起，按下按钮后显示反应时间，然后等待一段时间后返回等待状态。(1. Idle, which is the default state, is not responding to the test being executed.
2. This will inform users that a new reaction test is about to start.
For example, users can notify the upcoming reaction test by counting the 3, 2, 1 counts on the seven segment display.
Three. Test, once the preparation is finished, it becomes active. Once the subjects press the button, the reaction test will terminate, and it will stop.
4. As a result, before returning to the idle mode, it will display the response time of subjects for a period of time on the seven display.)