new mines system

src/engine/workthreads/MineThread.java

@@ -26,11 +26,12 @@ public class MineThread  implements Runnable {
     public void run() {
         LocalDateTime nextPulse = LocalDateTime.now().withMinute(59).minusHours(1);
         while (true) {
-            if(LocalDateTime.now().isAfter(nextPulse));
+            if(LocalDateTime.now().isAfter(nextPulse)) {
                 processMineWindows();
                 nextPulse = nextPulse.plusMinutes(30);
             }
         }
+    }
 
     public static void mineWindowOpen(Mine mine) {