int left = 0;
int right = 0;
String score;
unsigned long past1;

void setup() {

Serial.begin(9600);
Serial.println("BEGIN");
Serial.println();

pinMode (14, INPUT_PULLUP);
pinMode (18, INPUT_PULLUP);
pinMode (19, INPUT_PULLUP);

}

void loop() {

if (digitalRead(14) == LOW) {
  if (past1 < millis()) {
    left = 0;
    right = 0;
    past1 = millis() + 300;
  }
}

if (digitalRead(18) == LOW) {
  if (past1 < millis()) {
    left ++;
    past1 = millis() + 300;
  }
}

if (digitalRead(19) == LOW) {
  if (past1 < millis()) {
    right ++;
    past1 = millis() + 300;
  }
}

score = String(left) + String(" : ") + String(right);

Serial.println(score);

delay (10);
}