int Minimum = 1;
int Maximum = 7;

#include <LiquidCrystal.h>

const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {
  randomSeed(analogRead(0));
  delay(500);

  int Zahl = random(Minimum, Maximum);
  lcd.begin(16, 2);
  lcd.print(Zahl);
}

void loop() {
 
}