Debug commands for timer.

client/controls.js

@@ -163,6 +163,8 @@ Controls.prototype.msgCountdown = function(evt) {
     const diff = Math.ceil((now - timestamp) / 1000);
     const remaining = duration - diff;
 
+    console.error(timestamp, duration, now, diff, remaining);
+
     this.countdownStart(remaining);
 };