EEPROM record light

#include <EEPROM.h>
int sensorPin = 4;
long result = 0;

void setup()
{
  Serial.begin(9600);
  Serial.println("start");
  for (int i=0; i < 13; i++){
    Serial.println(RCtime(sensorPin) );
    delay(1);
    EEPROM.write(i, RCtime(sensorPin));
    delay(15000);
  }
}


void loop()
{
}

long RCtime(int sensPin){
  long result = 0;
  pinMode(sensPin, OUTPUT); // make pin OUTPUT
  digitalWrite(sensPin, HIGH); // make pin HIGH to discharge capacitor - study the schematic
  delay(1); // wait a ms to make sure cap is discharged
  pinMode(sensPin, INPUT); // turn pin into an input and time till pin goes low
  digitalWrite(sensPin, LOW); // turn pullups off - or it won't work
  while(digitalRead(sensPin)){ // wait for pin to go low
    result++;
  }
  return result;
}