Arduino for relay controls

//*Frequency*counter*sketch,*for*measuring*frequencies*low*enough*to*execute*an*interrupt*for*each*cycle
//*Connect*the*frequency*source*to*the*INT0*pin*(digital*pin*2*on*an*Arduino*Uno)

volatile*unsigned long firstPulseTime;
volatile*unsigned long lastPulseTime;
volatile*unsigned long numPulses;
int ledPin = 13;
int relay1Pin = 3;
int relay2Pin = 4;
int relay3Pin = 5;
int relay4Pin = 6;
void isr()
{
**unsigned long now = micros();
**if (numPulses == 1)
**{
****firstPulseTime*=*now;
**}
**else
**{
****lastPulseTime*=*now;
**}
**++numPulses;
}

void setup()
{
Serial.begin(19200);    // this is here so that we can print the result
digitalWrite (relay1Pin, HIGH);
digitalWrite (relay2Pin, HIGH);
digitalWrite (relay3Pin, HIGH);
digitalWrite (relay4Pin, HIGH);
pinMode(2,INPUT_PULLUP); 
pinMode(ledPin, OUTPUT);
pinMode(relay1Pin, OUTPUT);
pinMode(relay2Pin, OUTPUT);  
pinMode(relay3Pin, OUTPUT);  
pinMode(relay4Pin, OUTPUT);  
**digitalWrite (ledPin, HIGH);
**Serial.println("Delaying 60 Seconds to allow PC Boot");
**delay (10000);
****digitalWrite (ledPin, LOW);
**Serial.println("50 Seconds Remaining");
**delay (10000);
****digitalWrite (ledPin, HIGH);
**Serial.println("40 Seconds Remaining");
**delay (10000);
****digitalWrite (ledPin, LOW);
**Serial.println("30 Seconds Remaining");
**delay (10000);
****digitalWrite (ledPin, HIGH);
**Serial.println("20 Seconds Remaining");
**delay (10000);
**digitalWrite (ledPin, LOW);
**Serial.println("10 Seconds Remaining");
**delay (10000);
****digitalWrite (ledPin, HIGH);
**Serial.println("Charge Pump Started");
}

//*Measure*the*frequency*over*the*specified*sample*time*in*milliseconds,*returning*the*frequency*in*Hz
float readFrequency(unsigned int sampleTime)

{*numPulses*=*0;**********************// prime the system to start a new reading
**attachInterrupt(0, isr, RISING);    // enable the interrupt
**delay(sampleTime);
**detachInterrupt(0);
**return (numPulses < 3) ? 0 : (1000000.0 * (float)(numPulses - 2))/(float)(lastPulseTime - firstPulseTime);
}


void loop()
{

**
**float freq = readFrequency(100);
****if ( freq > 2000)
{
**digitalWrite (ledPin, HIGH);
**digitalWrite (relay1Pin, LOW);
**digitalWrite (relay2Pin, LOW);
**digitalWrite (relay3Pin, LOW);
**digitalWrite (relay4Pin, LOW);
**
**Serial.print("ChargePump Active. Current Frequency: ");
**Serial.println(freq);
}
else
{
**digitalWrite (ledPin, LOW);
**digitalWrite (relay1Pin, HIGH);
**digitalWrite (relay2Pin, HIGH);
**digitalWrite (relay3Pin, HIGH);
**digitalWrite (relay4Pin, HIGH);
**Serial.print("ChargePump Inactive. Current Frequency: ");
**Serial.println(freq);
}

**delay(100);
}