void makePicture() {
  saveFrame("data/shot.gif");
  img = loadImage("shot.gif");
  //ephPercentage();
  ephSerial();
  //video.start();
}

void backupFrame() {
  // save picture with results for backup
  saveFrame("history/shot_" + 
    nf(year(), 4) + nf(month(), 2) + nf(day(), 2) + "_" +
    nf(hour(), 2) + nf(minute(), 2) + nf(second(), 2) +
    ".gif");
  println("color count image saved");
}