Rock, Paper, Scissors with Arduino, tact switch and LCD Shield

gistfile1.txt

#include <LiquidCrystal.h>

int buttonPin = 7;

boolean pressedBefore = false;
boolean standby = true;

// Pin numbers connected to LCD's RS, E, DB4, DB5, DB6 and DB7
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  pinMode(buttonPin, INPUT);
  
  // 16 columns and 2 rows
  lcd.begin(16, 2);
  lcd.print("Let's Janken!");
  
  randomSeed(micros());
}

void loop() {
  if (digitalRead(buttonPin) > 0) {
    if (pressedBefore == false) {
      standby = false;
    }
    pressedBefore = true;
  } else {
    pressedBefore = false;
  }
  
  lcd.setCursor(0, 1);
  if (standby) {
    // Stand by
    lcd.print("Press button.");
  } else {
    // Count down
    lcd.setCursor(0, 1);
    lcd.print("3...         ");
    delay(1000);
    
    lcd.setCursor(0, 1);
    lcd.print("2...         ");
    delay(1000);
    
    lcd.setCursor(0, 1);
    lcd.print("1...         ");
    delay(1000);
    
    // Janken!
    lcd.setCursor(0, 1);
    switch(random(0, 2)) {
      case 0:
        lcd.print("Gu!  ");
        break;
      case 1:
        lcd.print("Choki!");
        break;
      case 2:
        lcd.print("Pa!  ");
        break;
    }
    delay(5000);
    
    standby = true;
  }
}