TV Timer thing for arduino

gistfile1.h

/*
 * TV Timer by Harrison Conlin
 * http://harrisony.com/tvtimer.html
 * 
 */

#include <LiquidCrystal.h>;
#define BTN2   (15)
#define POT    (3)
#define PIEZO  (9)
#define LATCH (11) // LED SHIFT REGISTER
#define DATA  (12)
#define CLOCK (10)

LiquidCrystal lcd(6,7,8,2,3,4,5);

void setup(void){
	lcd.clear();

	pinMode(BTN2, INPUT); // Right Button
	digitalWrite(BTN2, HIGH);
	pinMode(PIEZO, OUTPUT);    // Piezo Buzzer
	pinMode(LATCH, OUTPUT);   // LED Shift Register
	pinMode(DATA, OUTPUT);
	pinMode(CLOCK, OUTPUT);

	ledWrite(0);  // Clear the LED's
}

void loop(void){
	lcd.setCursor(0,0);
	lcd.print("Ready");
	lcd.setCursor(0, 1);
	int minutes = map(analogRead(POT), 0, 1023, 5 , 1);

	lcd.print("Min: ");
	lcd.print(minutes);
	lcd.print("   ");

	lcd.setCursor(14,1);
	lcd.print("Go");
	if (digitalRead(BTN2) == LOW){
	set(minutes*60); // turns minutes to sec
	}
}


void alert(void){
	long wait_atill  = millis() + 300;
	while (millis() < wait_atill){
		digitalWrite(PIEZO, HIGH);
		delayMicroseconds(2000);
		digitalWrite(PIEZO, LOW);
		delayMicroseconds(2000);
	}

	ledWrite(0);
	delay(200);
	ledWrite(255);
	delay(200);
	ledWrite(0);
	delay(200);
	ledWrite(255);
	delay(200);
	ledWrite(0);

}
void set(unsigned long time){  // This is when it starts getting really hacky and kludgy
	lcd.setCursor(14,1);
	lcd.print("  ");
	unsigned long origtime = millis();
	unsigned long waittime = origtime + (time  * 1000);
	while (millis() < waittime){
		byte i = map(millis(), origtime, waittime, 8,0); // For the LED's
		byte led = (i == 0) ? 0 : ((1 << i) - 1); // don't ask. I found it somewhere and it works (I think)
		ledWrite(led);
		lcd.setCursor(0,0);
		lcd.print("Time:");
		lcd.setCursor(6,0);
		int timeleft = ((waittime - millis())/1000); // time remaining in second
		if (timeleft > 60) { // If its more than a minute show M SS
			lcd.print(int(timeleft/60));
			lcd.print(" "); 
			lcd.print(timeleft % 60);
		}
		else {  //Otherwise SS
			lcd.print(timeleft);
		}
		lcd.print("     ");
	}
	lcd.setCursor(0,0);
	lcd.print("Done");
	lcd.print("      ");
	ledWrite(0);
	alert();
	alert();
	lcd.clear();
}

void ledWrite(byte a){
	digitalWrite(LATCH, LOW);
	shiftOut(DATA, CLOCK, LSBFIRST, a);
	digitalWrite(LATCH, HIGH);
}