(function(back) {
	Bangle.removeAllListeners("drag");
	Bangle.setUI("");
	var settings = require('Storage').readJSON("contourclock.json", true) || {};
	if (settings.fontIndex==undefined) {
	  settings.fontIndex=0;
	  require('Storage').writeJSON("myapp.json", settings);
	}
  savedIndex=settings.fontIndex;
  setWatch(function() {          //save changes and return to settings menu
    require('Storage').writeJSON("contourclock.json", settings);
		g.clear();
    back();
  }, BTN, { repeat:false, edge:'falling' });
  Bangle.on('lock', function () { //discard changes and return to clock
    settings.fontIndex=savedIndex;
    require('Storage').writeJSON("contourclock.json", settings);
		g.clear();
    load();
  });
  Bangle.on('swipe', function (direction) {
		var fontName = require('contourclock').drawClock(settings.fontIndex+direction);
    if (fontName) {
			settings.fontIndex+=direction;
      g.clearRect(0,0,g.getWidth()-1,16);
			g.setFontAlign(0,-1).drawString(fontName,g.getWidth()/2,0);
		} else {
			require('contourclock').drawClock(settings.fontIndex);
		}
  });
	g.reset();
	g.clear();
  g.setFont("6x8:2x2").setFontAlign(0,-1);
  g.drawString(require('contourclock').drawClock(settings.fontIndex),g.getWidth()/2,0);
  g.drawString("Swipe - change",g.getWidth()/2,g.getHeight()-36);
	g.drawString("BTN - save",g.getWidth()/2,g.getHeight()-18);
})