Reaction Timer

1/*
2Test your ability with the Reaction Timer
3 */
4
5// include  the library code:
6#include 
7
8// initialize the library with the numbers  of the interface pins
9LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
10
11int count  = 0;
12
13void setup() {
14  lcd.begin(16, 2);
15  pinMode(10, OUTPUT);
16  pinMode(A0, INPUT); //UP button
17  pinMode(A1, INPUT); //DOWN button
18  pinMode(A2,  INPUT); //START/STOP button
19  
20  lcd.clear();
21  lcd.setCursor(0, 0);
22  lcd.print("Arduino");
23  lcd.setCursor(0, 1);
24  lcd.print("Reaction Timer!");
25  delay(2000);
26  lcd.clear();
27  delay(1000);
28}
29
30void loop() {
31  SetCountdown(); //function to set the countdown
32  countdown();    //function  for the countdown
33  reaction();     //function who count your reaction
34}
35
36void  SetCountdown()
37{
38  lcd.clear();
39  lcd.print("Please set the");
40  lcd.setCursor(0,  1);
41  lcd.print("countdown");
42  delay(2000);
43  lcd.clear();
44  
45  while (digitalRead(A2) != LOW) //while you not press START
46  {
47    if (digitalRead(A0)  == LOW) //if UP is pressed
48    {
49      count++;
50      delay(200);
51      lcd.clear();  
52    }
53    if (count > 10) //10 seconds are enough to prepare yourself!
54      count = 0;
55
56    if (digitalRead(A1) == LOW) //if DOWN is pressed
57    {
58      count--;
59      delay(200);
60      lcd.clear(); 
61    }
62    
63    if (count  350 && elapsed  500)
64    lcd.print("Try again please");
65  delay(1500);
66}
67