#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
int ir1=10;
int ir2=9;
int count=0;
void setup() {
  // put your setup code here, to run once:
lcd.begin(16,2);
lcd.backlight();
lcd.setCursor(0,0);
lcd.print("count=");
pinMode(ir1,INPUT);
pinMode(ir2, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
if(digitalRead(ir1)==LOW)
{
  if(digitalRead(ir2)==LOW)
{
  count++;
}
}
if(digitalRead(ir2)==LOW)
{
  if(digitalRead(ir1)==LOW)
{
  count--;
}
}
lcd.setCursor(7,0);
lcd.print(count);
lcd.print("   ");
delay(30);
}