clock and temp w relay control

#include <OneWireTempSensor.h>
#include <Wire.h>
#include "RTClib.h"
#include <OneWire.h>
#include <LiquidCrystal.h>
int DS18S20_Pin = 7; //temp
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

RTC_DS1307 RTC; //timer


OneWire ds(DS18S20_Pin); //temp

void setup(void) {
Wire.begin();
RTC.begin();
lcd.begin(20, 4);
lcd.print("Time :");
pinMode(8, OUTPUT);
}

void loop(void) {
float temperature = getTemp();
float tempF = (temperature * 9.0)/ 5.0 + 32.0;

DateTime now = RTC.now();

  lcd.setCursor(7, 0);
     if ( now.hour() < 10) {
lcd.print("0");
}
     lcd.print(now.hour(), DEC);
    lcd.print(':');
if ( now.minute() < 10) {
lcd.print("0");
}
    lcd.print(now.minute(), DEC);
    lcd.print(':');
    if ( now.second() < 10) {
lcd.print("0");
}
    lcd.print(now.second(), DEC);

    lcd.setCursor(0, 1);
    lcd.print("Temp : ");
    lcd.print(tempF);
    lcd.print(" *F ");
    lcd.setCursor(0, 2);
    lcd.print("Temp : ");
    lcd.print(temperature);
    lcd.print(" *C ");

if ( tempF  < 78) {  //This line should turn on pin 8 @78F
digitalWrite(8, HIGH);
}
if ( tempF  > 77) {  //This line should turn off pin 8 @78F
digitalWrite(8, LOW);
}
}


float getTemp(){
//returns the temperature from one DS18S20 in DEG Celsius

byte data[12];
byte addr[8];

if ( !ds.search(addr)) {
//no more sensors on chain, reset search
ds.reset_search();
return -1000;
}



ds.reset();
ds.select(addr);
ds.write(0x44,1); // start conversion, with parasite power on at the end

byte present = ds.reset();
ds.select(addr);
ds.write(0xBE); // Read Scratchpad


for (int i = 0; i < 9; i++) { // we need 9 bytes
data[i] = ds.read();
}

ds.reset_search();

byte MSB = data[1];
byte LSB = data[0];

float tempRead = ((MSB << 8) | LSB); //using two's compliment
float TemperatureSum = tempRead / 16;

return TemperatureSum;

}