Arduino Controlled Jack-O-Lantern lighting

1 Arduino + 1 9Volt battery + 2 Red LED's



code:

#define LED2 9 // the pin for the LED
#define LED3 11 // the pin for the LED


int i = 0; // We'll use this to count up and down

void setup() {

pinMode(LED2, OUTPUT); // tell Arduino LED is an output
pinMode(LED3, OUTPUT); // tell Arduino LED is an output

}

void loop(){

for (i = 0; i < 255; i++) { // loop from 0 to 254 (fade in)
analogWrite(LED2, i); // set the LED brightness
analogWrite(LED3, i); // set the LED brightness
delay(8); // Wait 10ms because analogWrite
// is instantaneous and we would
// not see any change
}

for (i = 255; i > 0; i--) { // loop from 255 to 1 (fade out)

analogWrite(LED2, i); // set the LED brightness
analogWrite(LED3, i); // set the LED brightness
delay(8); // Wait 8ms
}
analogWrite(LED2, 0); // turn off led
analogWrite(LED3, 0); // turn off led
delay(400);


}