#define pressed digitalRead(12) == LOW

const unsigned char H[] = {8,9,10,11};
const unsigned char M[] = {2,3,4,5,6,7};

//const unsigned int mindelay = 60000;
const unsigned int mindelay = 59500;

unsigned char min = 0;
unsigned char hour = 0;

unsigned long lastmin;

#define nolog

void write(unsigned char m = 255, unsigned char h = 255) {
  //write minutes
  for(unsigned char i = 0; i < 6; i++) {
    analogWrite(M[i], (m & (1 << i)) ? 255 : 1);
  }
  
  for(unsigned char i = 0; i < 4; i++) {
    analogWrite(H[i], (h & (1 << i)) ? 255 : 4);
  }
  #ifndef nolog
  Serial.print(hour);
  Serial.print(":");
  Serial.println(min);
  #endif
}

void countTime() {
  if(60 == ++min) {
    min = 0;
    if(13 == ++hour) {
       hour = 0;
    }
  }
}

void setup() {
  pinMode(13, OUTPUT);
  #ifndef nolog
  Serial.begin(9600);
  #endif
  //Setup pins
 for(unsigned char m = 0; m < 6; m++) {
  pinMode(M[m], OUTPUT);
 }
 for(unsigned char h = 0; h < 4; h++) {
  pinMode(H[h], OUTPUT);
 }
 pinMode(12, INPUT_PULLUP);
 write();
 while(!pressed) delay(5);

 //setup time
 char mode = 0;
 bool pres = false;
 unsigned long timeout = millis();
 while(mode < 2) {
  if(pressed) {//button is pressed
    if(!pres) {//button was not pressed before
      timeout = millis();
      pres = true;
      if(mode == 0) {
        hour ++;
        if(hour == 13)
          hour = 1;
      } else {
        min ++;
        if(min == 60)
          min = 0;
      }
      write(min, hour);
    }
  } else {
    pres = false;
  }
  if(millis() - timeout > 10000) {
    for(int i = 0; i < 6; i++) {
      write(0,0);
      delay(300);
      write();
      delay(300);
    }
    write(min, hour);
    ++mode;
    timeout = millis();
  }
  delay(50);
 }
 lastmin = millis();
}

void loop() {
  if((millis() - lastmin) >= mindelay) {
    //update min
    countTime();
    write(min, hour);
    lastmin += mindelay;
  } else {
  #ifndef nolog
    Serial.print(millis()-lastmin);
    Serial.print(" ");
    Serial.println(millis()-lastmin >= mindelay);
  #endif
  }
  if(millis()/1000 % 2 == 0) {
    digitalWrite(13, HIGH);
  } else
    digitalWrite(13, LOW);
  delay(50);
}