implemented simple version of a Berlin Clock

apps/berlinc/add_to_apps.json

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+// Create an entry in apps.json as follows:
+{ "id": "berlinc",
+  "name": "Berlin Clock",
+  "icon": "app.png",
+  "description": "Berlin Clock",
+  "tags": "",
+  "storage": [
+    {"name":"+berlinc","url":"app.json"},
+    {"name":"-berlinc","url":"app.js"},
+    {"name":"*berlinc","url":"app-icon.js","evaluate":true}
+  ]
+}

apps/berlinc/berlin-clock-icon.js

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+require("heatshrink").decompress(atob("mEwwJC/AH4A/AH4AgA=="));

apps/berlinc/berlin-clock.js

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+(() => {
+
+    // place your const, vars, functions or classes here
+    fields = [ 4 , 4 , 11 , 4 ];
+    width = g.getWidth();
+    height = g.getHeight();
+    rowHeight = height/4;
+    rowlights = [];
+
+    function drawBerlinClock() {
+        var now = new Date();
+        rowlights[0] = now.getHours() / 5;
+        rowlights[1] = now.getHours() % 5;
+        rowlights[2] = now.getMinutes() / 5;
+        rowlights[3] = now.getMinutes() % 5;
+    
+        g.clear();
+        
+        g.drawRect(0,0,width,height);
+        for (row = 0 ; row < 4 ; row++) {
+          nfields = fields[row];
+          boxWidth = width/nfields;
+          
+          for (col = 0 ; col < nfields ; col++) {
+            x1 = col*boxWidth;
+            y1 = row*rowHeight;
+            x2 = (col+1)*boxWidth;
+            y2 = (row+1)*rowHeight;
+            
+            g.setColor(1,1,1);
+            g.drawRect(x1,y1,x2,y2);
+            if (col<rowlights[row]) {
+              
+              if (row === 2 ) {
+                if (((col+1) % 3) === 0) {
+                  g.setColor(1,0,0);
+                } else {
+                  g.setColor(1,1,0);
+                }
+              } else {
+                  g.setColor(1,0,0);
+              }
+              
+              g.fillRect(x1+2,y1+2,x2-2,y2-2);
+            }
+          }
+        }
+    }
+
+    // special function to handle display switch on
+    Bangle.on('lcdPower', (on) => {
+        if (on) {
+        	drawWidgets();
+            // call your app function here
+            drawBerlinClock();
+    }});
+
+    // call your app function here 
+
+    // refesh every 15 sec
+    setInterval(drawBerlinClock, 15E3);
+
+    drawBerlinClock();
+
+})();

apps/berlinc/berlin-clock.json

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+{
+  "name":"Berlin Clock",
+  "icon":"*berlinc",
+  "src":"-berlinc"
+}