Arduino "Reaction Timer" - My Kids Love Playing This

1#include <Wire.h> 
2#include <LiquidCrystal_I2C.h>
3#define btnSTART  5
4#define btnHIT 7
5#define ledTrigger 9
6LiquidCrystal_I2C lcd(0x23,20,4);
7
8void  setup() {
9  lcd.init(); 
10  lcd.backlight();
11  pinMode(btnSTART, INPUT_PULLUP);
12  pinMode(btnHIT, INPUT_PULLUP);
13  pinMode(ledTrigger, OUTPUT);
14  digitalWrite(ledTrigger,  LOW);
15  lcd.print("Salut Famille!");
16  delay(2000);
17  lcd.clear();
18  randomSeed(analogRead(0));
19}
20
21void loop() {
22  long timeReaction;
23  long timeTotal = 0;
24  lcd.print("Press START!");
25  while (digitalRead(btnSTART))  {}
26  delay(10);
27  while (!digitalRead(btnSTART)) {}
28  lcd.clear();
29  lcd.print("Jouez!!!");
30  delay(1000);
31  for (int i = 0; i < 5; i++) {
32    delay(random(500, 5000));
33    timeReaction = millis();
34    digitalWrite(ledTrigger,  HIGH);
35    while (digitalRead(btnHIT)) {}
36    timeReaction = millis() - timeReaction;
37    timeTotal += timeReaction;
38    delay(10);
39    while (!digitalRead(btnHIT))  {}
40    digitalWrite(ledTrigger, LOW);
41    lcd.clear();
42    lcd.print(i  + 1);
43    lcd.print(": ");
44    lcd.print(timeReaction);
45    delay(1000);
46  }
47  lcd.clear();
48  lcd.print("Moyenne = ");
49  lcd.print(timeTotal/5);
50  delay(10000);
51  lcd.clear();
52  }
53

1#include <Wire.h> 
2#include <LiquidCrystal_I2C.h>
3#define btnSTART
4  5
5#define btnHIT 7
6#define ledTrigger 9
7LiquidCrystal_I2C lcd(0x23,20,4);
8
9void
10  setup() {
11  lcd.init(); 
12  lcd.backlight();
13  pinMode(btnSTART, INPUT_PULLUP);
14
15  pinMode(btnHIT, INPUT_PULLUP);
16  pinMode(ledTrigger, OUTPUT);
17  digitalWrite(ledTrigger,
18  LOW);
19  lcd.print("Salut Famille!");
20  delay(2000);
21  lcd.clear();
22
23  randomSeed(analogRead(0));
24}
25
26void loop() {
27  long timeReaction;
28
29  long timeTotal = 0;
30  lcd.print("Press START!");
31  while (digitalRead(btnSTART))
32  {}
33  delay(10);
34  while (!digitalRead(btnSTART)) {}
35  lcd.clear();
36
37  lcd.print("Jouez!!!");
38  delay(1000);
39  for (int i = 0; i < 5; i++) {
40
41    delay(random(500, 5000));
42    timeReaction = millis();
43    digitalWrite(ledTrigger,
44  HIGH);
45    while (digitalRead(btnHIT)) {}
46    timeReaction = millis() - timeReaction;
47
48    timeTotal += timeReaction;
49    delay(10);
50    while (!digitalRead(btnHIT))
51  {}
52    digitalWrite(ledTrigger, LOW);
53    lcd.clear();
54    lcd.print(i
55  + 1);
56    lcd.print(": ");
57    lcd.print(timeReaction);
58    delay(1000);
59
60  }
61  lcd.clear();
62  lcd.print("Moyenne = ");
63  lcd.print(timeTotal/5);
64
65  delay(10000);
66  lcd.clear();
67  }
68