Heart Rate monitor with Arduino uno

Build a heart rate monitor to check heart beat rate. Press Start button to Start the process and second button is used here for reset the counter.

	#include<LiquidCrystal.h>
	LiquidCrystal lcd(13, 12, 5, 4, 3, 2);
	int in = 8;
	int Reset=6;
	int start=7;
	int count=0,i=0,k=0,rate=0;
	unsigned long time2,time1;
	unsigned long time;
	byte heart[8] =
	{
	0b00000,
	0b01010,
	0b11111,
	0b11111,
	0b11111,
	0b01110,
	0b00100,
	0b00000
	};
	void setup()
	{
	lcd.createChar(1, heart);
	lcd.begin(16,2);
	lcd.print("Heart Beat ");
	lcd.write(1);
	lcd.setCursor(0,1);
	lcd.print("Monitering");
	pinMode(in, INPUT);
	pinMode(Reset, INPUT);
	pinMode(start, INPUT);
	digitalWrite(Reset, HIGH);
	digitalWrite(start, HIGH);
	delay(1000);
	}
	void loop()
	{
	if(!(digitalRead(start)))
	{
	k=0;
	lcd.clear();
	lcd.print("Please wait.......");
	while(k<5)
	{
	if(digitalRead(in))
	{
	if(k==0)
	time1=millis();
	k++;
	while(digitalRead(in));
	}
	}
	time2=millis();
	rate=time2-time1;
	rate=rate/5;
	rate=60000/rate;
	lcd.clear();
	lcd.print("Heart Beat Rate:");
	lcd.setCursor(0,1);
	lcd.print(rate);
	lcd.print(" ");
	lcd.write(1);
	k=0;
	rate=0;
	}
	if(!digitalRead(Reset))
	{
	rate=0;
	lcd.clear();
	lcd.print("Heart Beat Rate:");
	lcd.setCursor(0,1);
	lcd.write(1);
	lcd.print(rate);
	k=0;
	}
	}

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