diff --git a/src/main/java/de/deversmann/domain/Zeiterfassung.java b/src/main/java/de/deversmann/domain/Zeiterfassung.java
index e58ddcb..f3b7012 100644
--- a/src/main/java/de/deversmann/domain/Zeiterfassung.java
+++ b/src/main/java/de/deversmann/domain/Zeiterfassung.java
@@ -1,41 +1,38 @@
 package de.deversmann.domain;
 
+
 public class Zeiterfassung {
-    private long startzeit;
-    private long endzeit;
-    private boolean laufen;
+
+    private long startTime;
+    private long endTime;
+    private boolean isRunning;
+
+    public Zeiterfassung() {
+        this.isRunning = false;
+    }
 
     public void start() {
-        this.startzeit = System.currentTimeMillis();
-        this.laufen= true;
+        if (!isRunning) {
+            startTime = System.currentTimeMillis();
+            isRunning = true;
+            System.out.println("Zeiterfassung gestartet");
+        }
     }
 
     public void stop() {
-        this.endzeit = System.currentTimeMillis();
-        this.laufen= false;
+        if (isRunning) {
+            endTime = System.currentTimeMillis();
+            isRunning = false;
+            System.out.println("Zeiterfassung gestoppt, diff=" + getElapsedTimeInSeconds() + "s");
+        }
     }
 
-    public long getElapsedTimeMillis() {
-        long endTime = laufen ? System.currentTimeMillis() : endzeit;
-        return endTime - startzeit;
+    public long getElapsedTimeInSeconds() {
+        if (isRunning) {
+            long current = System.currentTimeMillis();
+            return (current - startTime) / 1000;
+        } else {
+            return (endTime - startTime) / 1000;
+        }
     }
-
-    public void reset() {
-        this.startzeit = 0;
-        this.endzeit = 0;
-        this.laufen = false;
-    }
-
-    public String getFormattedTime() {
-        long elapsed = getElapsedTimeMillis();
-        long hours = elapsed / (3600_000);
-        long remainder = elapsed % 3600_000;
-        long minutes = remainder / 60_000;
-        remainder = remainder % 60_000;
-        long seconds = remainder / 1_000;
-        long millis = remainder % 1_000;
-
-        // Formatierung zu einer lesbaren Zeitangabe
-        return String.format("%02d:%02d:%02d.%03d", hours, minutes, seconds, millis);
-    }
-}
+}
\ No newline at end of file