lesson_2_1

int whiteLed = 9;

void setup ()
{
pinMode (whiteLed, OUTPUT);
}

void loop ()
{
digitalWrite (whiteLed, HIGH);
}


lesson_2_2

int whiteLed = 9;
int timeOn = 500;
int timeOff = 500;

void setup ()
{
pinMode (whiteLed, OUTPUT);
}

void loop ()
{
digitalWrite (whiteLed, HIGH);
delay (timeOn);
degitalWrite (whiteLed, LOW);
delay (timerOff);
}

lesson 2-3

int whiteLed = 9;
int timeOn = 100;
int timeOff = 900;

void setup ()
{
pinMode (whiteLed, OUTPUT);
}

void loop ()
{
digitalWrite (whiteLed, HIGH);
delay (timeOn);
degitalWrite (whiteLed, LOW);
delay (timerOff);
}
