diff --git a/tempest.html b/tempest.html
index a873565..c6aa4f9 100644
--- a/tempest.html
+++ b/tempest.html
@@ -6,7 +6,7 @@
     <title>Weather Test</title>
     <script>
       // get ready to calculate relative time
-      var units = {
+      const units = {
         year  : 24 * 60 * 60 * 1000 * 365,
         month : 24 * 60 * 60 * 1000 * 365/12,
         day   : 24 * 60 * 60 * 1000,
@@ -14,120 +14,115 @@
         minute: 60 * 1000,
         second: 1000
       }
-      var rtf = new Intl.RelativeTimeFormat('en', { numeric: 'auto' })
-      var getRelativeTime = (d1, d2 = new Date()) => {
-        var elapsed = d1 - d2
+      let rtf = new Intl.RelativeTimeFormat('en', { numeric: 'auto' })
+      let getRelativeTime = (d1, d2 = new Date()) => {
+        let elapsed = d1 - d2
         for (var u in units)
-          if (Math.abs(elapsed) > units[u] || u == 'second')
+          if (Math.abs(elapsed) > units[u] || u === 'second')
             return rtf.format(Math.round(elapsed/units[u]), u)
       }
 
-      var tempRanges = [
+      // set up temperature and rain ranges
+      const tempRanges = [
         { upper: 32, label: 'cold' },
         { upper: 60, label: 'cool' },
         { upper: 80, label: 'warm' },
         { upper: Infinity, label: 'hot' }
       ];
-
-      var rainRanges = [
+      const rainRanges = [
         { upper: 0.02, label: 'none' },
         { upper: 0.2, label: 'light' },
         { upper: 1.4, label: 'moderate' },
         { upper: Infinity, label: 'heavy' }
       ]
 
-      // weather code inspired by https://kris.omg.lol
-      // fetch from API proxy
-      fetch('https://paste.jbowdre.lol/tempest.json/raw')
-        .then(res => res.json())
-        .then(function(res){
-
-          // calculate age of last update
-          updateTime = res.time;
-          var updateTime = parseInt(updateTime);
-          var updateTime = updateTime*1000;
-          var updateTime = new Date(updateTime);
-          updateAge = getRelativeTime(updateTime);
-
-          // parse data
-          conditions = (res.conditions).toLowerCase();
-          tempDiff = Math.abs(res.air_temperature - res.feels_like);
-          temp = `${res.air_temperature}°f (${(((res.air_temperature - 32) * 5) / 9).toFixed(1)}°c)`;
-          if (tempDiff >= 5) {
-            temp += `, feels ${res.feels_like}°f (${(((res.feels_like - 32) *5) / 9).toFixed(1)}°c)`;
-          }
-          tempLabel = (tempRanges.find(range => res.feels_like < range.upper)).label;
-          humidity = `${res.relative_humidity}% humidity`;
-          wind = `${res.wind_gust}mph (${(res.wind_gust*1.609344).toFixed(1)}kph) from ${(res.wind_direction_cardinal).toLowerCase()}`;
-          precipLabel = (rainRanges.find(range => res.precip_accum_local_day < range.upper)).label;
-          if (res.precip_accum_local_day == 0) {
-            precipToday = 'no rain today';
-          } else {
-            precipToday = `${res.precip_accum_local_day}" rain today`;
-          }
-          pressureTrend = res.pressure_trend;
-          pressure = `${res.station_pressure}inhg and ${pressureTrend}`;
-          icon = res.icon;
-
-          // display data
-          document.getElementById('time').innerHTML = updateAge;
-          document.getElementsByClassName('fa-cloud-sun-rain')[0].classList = CLASS_MAP_WX[icon];
-          document.getElementById('conditions').innerHTML = conditions;
-          document.getElementsByClassName('fa-temperature-half')[0].classList = CLASS_MAP_TEMP[tempLabel];
-          document.getElementById('temp').innerHTML = temp;
-          document.getElementById('humidity').innerHTML = humidity;
-          document.getElementById('wind').innerHTML = wind;
-          document.getElementsByClassName('fa-droplet-slash')[0].classList = CLASS_MAP_RAIN[precipLabel];
-          document.getElementById('precipToday').innerHTML = precipToday;
-          document.getElementsByClassName('fa-arrow-right-long')[0].classList = CLASS_MAP_PRESS[pressureTrend];
-          document.getElementById('pressure').innerHTML = pressure;
-        });
-
-      // change the pressure icon
+      // maps for selecting icons
       const CLASS_MAP_PRESS = {
-      'steady': 'fa-solid fa-arrow-right-long',
-      'rising': 'fa-solid fa-arrow-trend-up',
-      'falling': 'fa-solid fa-arrow-trend-down'
+        'steady': 'fa-solid fa-arrow-right-long',
+        'rising': 'fa-solid fa-arrow-trend-up',
+        'falling': 'fa-solid fa-arrow-trend-down'
       }
-
-      // change the rainfall icon
       const CLASS_MAP_RAIN = {
         'none': 'fa-solid fa-droplet-slash',
         'light': 'fa-solid fa-glass-water-droplet',
         'moderate': 'fa-solid fa-glass-water',
         'heavy': 'fa-solid fa-bucket'
       }
-
-      // change the temperature icon
       const CLASS_MAP_TEMP = {
-      'hot': 'fa-solid fa-thermometer-full',
-      'warm': 'fa-solid fa-thermometer-half',
-      'cool': 'fa-solid fa-thermometer-quarter',
-      'cold': 'fa-solid fa-thermometer-empty'
+        'hot': 'fa-solid fa-thermometer-full',
+        'warm': 'fa-solid fa-thermometer-half',
+        'cool': 'fa-solid fa-thermometer-quarter',
+        'cold': 'fa-solid fa-thermometer-empty'
+      }
+      const CLASS_MAP_WX = {
+        'clear-day': 'fa-solid fa-sun',
+        'clear-night': 'fa-solid fa-moon',
+        'cloudy': 'fa-solid fa-cloud',
+        'foggy': 'fa-solid fa-cloud-showers-smog',
+        'partly-cloudy-day': 'fa-solid fa-clouds-sun',
+        'partly-cloudy-night': 'fa-solid fa-clouds-moon',
+        'possibly-rainy-day': 'fa-solid fa-cloud-sun-rain',
+        'possibly-rainy-night': 'fa-solid fa-cloud-moon-rain',
+        'possibly-sleet-day': 'fa-solid fa-cloud-meatball',
+        'possibly-sleet-night': 'fa-solid fa-cloud-moon-rain',
+        'possibly-snow-day': 'fa-solid fa-snowflake',
+        'possibly-snow-night': 'fa-solid fa-snowflake',
+        'possibly-thunderstorm-day': 'fa-solid fa-cloud-bolt',
+        'possibly-thunderstorm-night': 'fa-solid fa-cloud-bolt',
+        'rainy': 'fa-solid fa-cloud-showers-heavy',
+        'sleet': 'fa-solid fa-cloud-rain',
+        'snow': 'fa-solid fa-snowflake',
+        'thunderstorm': 'fa-solid fa-cloud-bolt',
+        'windy': 'fa-solid fa-wind',
       }
 
-      // change the weather icon
-      const CLASS_MAP_WX = {
-      'clear-day': 'fa-solid fa-sun',
-      'clear-night': 'fa-solid fa-moon',
-      'cloudy': 'fa-solid fa-cloud',
-      'foggy': 'fa-solid fa-cloud-showers-smog',
-      'partly-cloudy-day': 'fa-solid fa-clouds-sun',
-      'partly-cloudy-night': 'fa-solid fa-clouds-moon',
-      'possibly-rainy-day': 'fa-solid fa-cloud-sun-rain',
-      'possibly-rainy-night': 'fa-solid fa-cloud-moon-rain',
-      'possibly-sleet-day': 'fa-solid fa-cloud-meatball',
-      'possibly-sleet-night': 'fa-solid fa-cloud-moon-rain',
-      'possibly-snow-day': 'fa-solid fa-snowflake',
-      'possibly-snow-night': 'fa-solid fa-snowflake',
-      'possibly-thunderstorm-day': 'fa-solid fa-cloud-bolt',
-      'possibly-thunderstorm-night': 'fa-solid fa-cloud-bolt',
-      'rainy': 'fa-solid fa-cloud-showers-heavy',
-      'sleet': 'fa-solid fa-cloud-rain',
-      'snow': 'fa-solid fa-snowflake',
-      'thunderstorm': 'fa-solid fa-cloud-bolt',
-      'windy': 'fa-solid fa-wind',
-      }
+      // fetch data from pastebin
+      fetch('https://paste.jbowdre.lol/tempest.json/raw')
+        .then(res => res.json())
+        .then(function(res){
+
+          // calculate age of last update
+          let updateTime = res.time;
+          updateTime = parseInt(updateTime);
+          updateTime = updateTime*1000;
+          updateTime = new Date(updateTime);
+          let updateAge = getRelativeTime(updateTime);
+
+          // parse data
+          let conditions = (res.conditions).toLowerCase();
+          let tempDiff = Math.abs(res.air_temperature - res.feels_like);
+          let temp = `${res.air_temperature}°f (${(((res.air_temperature - 32) * 5) / 9).toFixed(1)}°c)`;
+          if (tempDiff >= 5) {
+            temp += `, feels ${res.feels_like}°f (${(((res.feels_like - 32) *5) / 9).toFixed(1)}°c)`;
+          }
+          let tempLabel = (tempRanges.find(range => res.feels_like < range.upper)).label;
+          let humidity = `${res.relative_humidity}% humidity`;
+          let wind = `${res.wind_gust}mph (${(res.wind_gust*1.609344).toFixed(1)}kph) from ${(res.wind_direction_cardinal).toLowerCase()}`;
+          let precipLabel = (rainRanges.find(range => res.precip_accum_local_day < range.upper)).label;
+          let precipToday;
+          if (res.precip_accum_local_day === 0) {
+            precipToday = 'no rain today';
+          } else {
+            precipToday = `${res.precip_accum_local_day}" rain today`;
+          }
+          let pressureTrend = res.pressure_trend;
+          let pressure = `${res.station_pressure}inhg and ${pressureTrend}`;
+          let icon = res.icon;
+
+          // display data
+          document.getElementById('time').innerHTML = updateAge;
+          document.getElementById('conditions').innerHTML = conditions;
+          document.getElementById('temp').innerHTML = temp;
+          document.getElementById('humidity').innerHTML = humidity;
+          document.getElementById('wind').innerHTML = wind;
+          document.getElementById('precipToday').innerHTML = precipToday;
+          document.getElementById('pressure').innerHTML = pressure;
+          // update icons
+          document.getElementsByClassName('fa-cloud-sun-rain')[0].classList = CLASS_MAP_WX[icon];
+          document.getElementsByClassName('fa-temperature-half')[0].classList = CLASS_MAP_TEMP[tempLabel];
+          document.getElementsByClassName('fa-droplet-slash')[0].classList = CLASS_MAP_RAIN[precipLabel];
+          document.getElementsByClassName('fa-arrow-right-long')[0].classList = CLASS_MAP_PRESS[pressureTrend];
+        });
     </script>
   </head>
   <body>