please help trying to use the "if" Statement Solved

HI
I am new and trying to learn....please see this simple sketch
it works great what I am trying to do next is if delayPeriod = 100 then I like to start again and have delayPeriod = 10....I just cant get it correct keep getting errors thank you in advance Patrick

/*
test Sketch to learn.
*/

// Pin 13 has an LED connected on most Arduino boards.
// give it a name:
int led = 13;
int delayPeriod = 10;

// the setup routine runs once when you press reset:
void setup() {
// initialize the digital pin as an output.
pinMode(led, OUTPUT);
}

// the loop routine runs over and over again forever:
void loop() {
digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level)
delay (delayPeriod); // wait
digitalWrite(led, LOW); // turn the LED off by making the voltage LOW
delay(delayPeriod); // wait
delayPeriod = delayPeriod + 1;
}

Try:

if (delayPeriod == 100 )
{
delayPeriod = 10;
}

delayPeriod = delayPeriod + 1;

Have you ever wondered why the language we use is not called C=C+1?