PoV Watch code!
/*******************************************************************************
  LED POV (Persistance Of Vision) watch software v0.00
  By: David DiPaola
  Hardware:
    -ATMega168 running at 8Mhz (internal oscillator) and 3v
    -External 32hz oscillator (for timekeeping)
    -TTL serial (for timesetting and programming)
    -Single momentary pushbutton on pin 0 (turns watch on for a bit)
    -Five 3v LEDs on pins 1-6
*******************************************************************************/

//Constants
int WIDTH = 2;     //Number of ms for each "column" of virtual display
int DELAY = 1;     //Number of ms for spacing between columns
int BUTTON = 0;         //Digital I/O port for the pushbutton
              //NOTE: This LED setup is for watches worn on the LEFT
              //wrist, if you wear your watch on the right, reverse
              //the order of the numbers below.
int LED_A = 6;          //Digital I/O port for LED A
int LED_B = 4;          //Digital I/O port for LED B
int LED_C = 3;          //Digital I/O port for LED C
int LED_D = 2;          //Digital I/O port for LED D
int LED_E = 1;          //Digital I/O port for LED E

void setup(){
  pinMode(0, INPUT);
  pinMode(LED_A, OUTPUT);
  pinMode(LED_B, OUTPUT);
  pinMode(LED_C, OUTPUT);
  pinMode(LED_D, OUTPUT);
  pinMode(LED_E, OUTPUT);
}

void loop(){
  drawOne();
  drawTwo();
  drawColon();
  drawFive();
  drawNine();
  drawP();
  drawSpace();
  drawSpace();
  drawSpace();
}

void setLEDs(boolean A, boolean B, boolean C, boolean D, boolean E){
  digitalWrite(LED_A, A);
  digitalWrite(LED_B, B);
  digitalWrite(LED_C, C);
  digitalWrite(LED_D, D);
  digitalWrite(LED_E, E);
}

void drawZero(){
    setLEDs(0, 1, 1, 1, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 0, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 0, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 1, 1, 1, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
}

void drawOne(){
    setLEDs(1, 0, 0, 0, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 0, 1, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 1, 1, 1, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 0, 0, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
}

void drawTwo(){
    setLEDs(1, 0, 0, 1, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 1, 0, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 1, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 0, 1, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
}

void drawThree(){
    setLEDs(0, 1, 0, 1, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 1, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 1, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 1, 0, 1, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
}

void drawFour(){
    setLEDs(0, 0, 1, 1, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 0, 1, 0, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 0, 1, 0, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 1, 1, 1, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
}

void drawFive(){
    setLEDs(1, 0, 1, 1, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 1, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 1, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 1, 0, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
}

void drawSix(){
    setLEDs(0, 1, 1, 0, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 1, 1, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 1, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 1, 0, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
}

void drawSeven(){
    setLEDs(0, 0, 0, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 1, 0, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 0, 1, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 0, 0, 1, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
}

void drawEight(){
    setLEDs(0, 1, 0, 1, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 1, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 1, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 1, 0, 1, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
}

void drawNine(){
    setLEDs(1, 0, 0, 1, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 1, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 0, 1, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 1, 1, 1, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
}

void drawColon(){
    setLEDs(0, 0, 0, 0, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 1, 0, 1, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 1, 0, 1, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 0, 0, 0, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
}

void drawA(){
    setLEDs(1, 1, 1, 1, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 0, 1, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 0, 1, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(1, 1, 1, 1, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
}

void drawP(){
    setLEDs(1, 1, 1, 1, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 0, 1, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 0, 1, 0, 1);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 0, 0, 1, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
}

void drawSpace(){
    setLEDs(0, 0, 0, 0, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 0, 0, 0, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 0, 0, 0, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
    setLEDs(0, 0, 0, 0, 0);
    delay(WIDTH);
    setLEDs(0, 0, 0, 0, 0);
    delay(DELAY);
}