HW09_02: LED Traffic Light

/*

Blink

Turns on an LED on for one second, then off for one second, repeatedly.

This example code is in the public domain.

*/

void setup() {

// initialize the digital pin as an output.

// Pin 13 has an LED connected on most Arduino boards:

pinMode(1, OUTPUT);

pinMode(2, OUTPUT);

pinMode(3, OUTPUT);

}

void loop() {

red();

amber();

green();

}

void red()

{

digitalWrite(1, HIGH); // set the LED on

delay(10000); // wait for a second

digitalWrite(1, LOW); // set the LED off

}

void amber()

{

digitalWrite(2, HIGH); // set the LED on

delay(3000); // wait for a second

digitalWrite(2, LOW); // set the LED off

}

void green()

{

digitalWrite(3, HIGH); // set the LED on

delay(10000); // wait for a second

digitalWrite(3, LOW); // set the LED off

}

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It show traffic Light with using Port1, 2, and 3. Port1 has turn on for 10 seconds and Port2 has turn on for 3 seconds, Port3 is same with port1.