#include <Wire.h> 
#include <LiquidCrystal.h>
LiquidCrystal lcd(12,11,5,4,3,2);

const int sensorPin = 0;
int sensorState = 0;
int previousSensorState = 0;

void setup() {
pinMode(sensorPin, INPUT);
Serial.begin(12000);
lcd.begin(20,4);
lcd.print("Enter money!");

}

void loop() {

sensorState = digitalRead(sensorPin);
if(sensorState != previousSensorState) {
  if (sensorState == 1) {
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("Select your treat!");
  }
}
  Serial.println(sensorState);
Serial.read();

}