// Some initialization
Bangle.setGPSPower(true);
g.clear();

// variables
var firstRun = true;
const text_y = 80;
const font = "Vector";
var STOR = require("Storage");
var FACES = [];
STOR.list(/\.trailsense\.js$/).forEach(face=>FACES.push(eval(require("Storage").read(face))));
var currentFace = 0;



FACES[currentFace].drawFace();

Bangle.setUI("updown", (upOrDown) => {
  if(!firstRun) FACES[currentFace].stop();
  firstRun = false;  // loop ran once; firstRun has to be false
  if(isNaN(upOrDown)) upOrDown = 0;
  currentFace += upOrDown;
  if(currentFace > FACES.length-1) { currentFace = 0; }
  if(currentFace < 0) { currentFace = FACES.length-1; }
  FACES[currentFace].drawFace();
});