Blinking using a for loop (Tasks 17,18)

The following code uses a for loop to blink the LED on pin 13 5 times after blinking one on pin 12:

void setup() {
pinMode(13, OUTPUT);
pinMode(12, OUTPUT);
}

void loop()
{
digitalWrite(12, 1);
delay(500);
digitalWrite(12,0);
delay(500);
for (int i=0; i < 5; i++){
digitalWrite(13,1);
delay(500);
digitalWrite(13,0);
delay(500);
}
}

The number of times that the second LED flashes can be changed simply by changing the for statement for example: for (int i=0; i < 23; i++) will flash 23 times rather than 5