Fastest hit wins

const boolean inputMode = HIGH; //define input mode for the sensor reading
const int LED1 = 8; //define LED 1 on pin8
const int LED2 = 9; //define LED 2 on pin 9
const int AMPR = 5; //define traffic light red on pin 5
const int AMPY = 6; //define traffic light yellow on pin 6
const int AMPG = 7; //define traffic light green on pin 7
const int SWI1 = A0; //define sensor SWI1 on analog pin 0
const int SWI2 = A1; //define sensor SWI2 on analog pin 1
const int THR1 = 10; //define threshold for sensor 1
const int THR2 = 10; //define threshold for sensor 2

int sensorReading1 = 0; //set sensor reading 1 to 0
int sensorReading2 = 0;  //set sensor reading 2 to 0
 
void setup() { //make the setup
  Serial.begin(9600);
  pinMode(LED1, OUTPUT); //define LED1 as output
  pinMode(LED2, OUTPUT); //define LED2 as output
  pinMode(AMPR, OUTPUT); //define traffic light red as output
  pinMode(AMPY, OUTPUT); //define traffic light yellow as output
  pinMode(AMPG, OUTPUT); // define traffic light green as output
  pinMode(SWI1, INPUT);  //define switch 1 as input
  pinMode(SWI2, INPUT); //define switch 2 as input
  delay(1000); //wait for 1 sec
}

void loop() //Game
{
  randomSeed(millis());
  digitalWrite(AMPR, HIGH); //switch on red traffic light
  digitalWrite(AMPG, LOW); //switch off green traffic light
  digitalWrite(AMPY, LOW);  //switch off yellow traffic light
  delay(1000); //wait 1 second
  digitalWrite(AMPR, LOW); //switch off red traffic light
  digitalWrite(AMPY, HIGH); //switch on yellow traffic light (green is anyway off)
  delay(1000);
  digitalWrite(AMPY, LOW); //switch off yellow traffic light
  delay(random(2000)+4000); //wait for 2 seconds plus 0 to 4 seconds (so min 2, max 6 seconds)
  digitalWrite(AMPG, HIGH); //afterwards switch on green traffic light
  int i=0;
  while (i < 1)
    {
      sensorReading1 = analogRead(SWI1); //read out sensor 1
      sensorReading2 = analogRead(SWI2); //read out sensor 2
      if (sensorReading1 >= THR1) { //check if sensor 1 reading is above threshold, if so
        Serial.println(sensorReading1); //print result of sensorreading 1 in serial monitor
        Serial.println(sensorReading2); //and print result of sensorreading 2 in serial monitor 
        digitalWrite(LED1, HIGH); //switch on LED 1 in order to show that player 1 is the winner
        digitalWrite(AMPG, LOW); //switch off green light
        delay(5000); // wait for 5 seconds
        digitalWrite(LED1, LOW); //switch off LED 1
        break; //end the while
      }
      if (sensorReading2 >= THR2) { //check if sensor 2 reading is above threshold, if so
        Serial.println(sensorReading1); //print result of sensorrading 1 in serial monitor
        Serial.println(sensorReading2); //and print result of sensorreading 2 in serial monitor
        digitalWrite(LED2, HIGH); //switch on LED 2 in order show that player 2 is the winner
        digitalWrite(AMPG, LOW); //switch off green traffic light
        delay(5000); //wait for 5 secs
        digitalWrite(LED2, LOW); //switch off LED 2
        break; //end the while 
      }
    }
delay(2000); //wait for 2 secs
}