#include <LiquidCrystal.h>
#define pow 0

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

void setup() {
  pinMode(pow, OUTPUT);
  digitalWrite(pow, HIGH);

  lcd.begin(16, 2);
  // you can now interact with the LCD, e.g.:
  lcd.print("Hello World!");
}

void loop() {
  // ...
}