uint32_t timer;

int reading;

uint32_t counter;

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

}


void loop()
{
  timer = millis();

  while(1)
  {
      reading = analogRead(0);
      counter++;
      if(millis() - timer > 10000)
      {
         break;
      }
  }

  Serial.println(counter);
  counter = 0;
}