#include <LiquidCrystal.h>  //P129-135的LCD案例改进优化版
LiquidCrystal lcd(12, 11, 10, 9, 8, 7);
void setup() {
  lcd.begin(16, 2);
  lcd.print("  Welcome 1624");
  lcd.setCursor(0, 1);
  lcd.print("I Love Mega2560");}
void loop() {}