SD experiment 3

#include <SD.h>

File myFile;

void setup()
{
  Serial.begin(9600);

  Serial.println("Press a key to start");
  while(!Serial.available()) {};

  Serial.print("Initializing SD card...");
  pinMode(10, OUTPUT);

  if (!SD.begin(10)) {
    Serial.println("initialization failed!");
    return;
  }

  Serial.println("Starting experiment.");
}

int i=0;
void loop()
{
   if(i<1000) {
      myFile = SD.open("WR_EXP.CSV", FILE_WRITE);
      myFile.print(micros());
      myFile.close();
      i++;
   } else {
      Serial.println("Experiment Finished");
      while(true){}
   }
}