Help with JS please

I tried it out. My only thought would be to make the full screen version a settings option.
To implement sunrise and sunset take a look at the code in the sunrise / sunset clock_info app.

https://raw.githubusercontent.com/espruino/BangleApps/master/apps/clkinfosunrise/clkinfo.js

(function() {
  // get today's sunlight times for lat/lon
  var sunrise, sunset, date;
  var SunCalc = require("suncalc"); // from modules folder
  const locale = require("locale");

  function calculate() {
    var location = require("Storage").readJSON("mylocation.json",1)||{};
    location.lat = location.lat||51.5072;
    location.lon = location.lon||0.1276; // London
    date = new Date(Date.now());
    var times = SunCalc.getTimes(date, location.lat, location.lon);
    sunrise = times.sunrise;
    sunset = times.sunset;
    /* do we want to re-calculate this every day? Or we just assume
    that 'show' will get called once a day? */
  }