diff --git a/LoadingBar.java b/LoadingBar.java
index ede659f..7727275 100644
--- a/LoadingBar.java
+++ b/LoadingBar.java
@@ -1,14 +1,18 @@
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.io.IOException;
 import java.math.BigDecimal;
 import java.math.MathContext;
 import java.math.RoundingMode;
+import java.nio.charset.StandardCharsets;
 import java.text.DecimalFormat;
-import java.time.LocalTime;
 import java.time.format.DateTimeFormatter;
+import java.time.LocalTime;
 import java.time.temporal.ChronoUnit;
 import java.util.Arrays;
+import java.util.concurrent.TimeUnit;
 import java.util.List;
 import java.util.Objects;
-import java.util.concurrent.TimeUnit;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
@@ -60,13 +64,79 @@ public class LoadingBar {
    }
 
 
-   public static void main(String[] args) {
-      if (args.length > 0 && Objects.equals(args[0], "--help")) {
+   public static void main(String[] args) throws IOException {
+      if (args.length == 0) {
+         askParametersAndRun();
+      } else {
+         parseParametersAndRun(args);
+      }
+   }
+
+
+   private static void askParametersAndRun() throws IOException {
+      var br = new BufferedReader(new InputStreamReader(System.in, StandardCharsets.UTF_8));
+      System.out.print("Ankunftszeit: ");
+      String startTimeRaw = br.readLine();
+      var startTime = LocalTime.parse(startTimeRaw, TIME_FORMATTER);
+      handleMittagspause(br, startTime);
+      handleZapfenstreich(br, startTime);
+   }
+
+
+
+   private static void handleMittagspause(BufferedReader br, LocalTime startTime) throws IOException {
+      System.out.print("Mittagspause verschieben um (optional): ");
+      String mittagspauseOffsetRaw = br.readLine();
+      if (mittagspauseOffsetRaw != null && !mittagspauseOffsetRaw.isBlank()) {
+         var mittagspauseOffset = Integer.parseInt(mittagspauseOffsetRaw);
+         showLoadingBarMittagspause(startTime, mittagspauseOffset);
+         return;
+      }
+      System.out.print("Mittagspause um (optional): ");
+      String manualMittagspauseRaw = br.readLine();
+      if (mittagspauseOffsetRaw != null && !mittagspauseOffsetRaw.isBlank()) {
+         var manualMittagspause = LocalTime.parse(manualMittagspauseRaw, TIME_FORMATTER);
+         showLoadingBarMittagspause(startTime, manualMittagspause);
+      } else {
+         showLoadingBarMittagspause(startTime);
+      }
+   }
+
+
+   private static void handleZapfenstreich(BufferedReader br, LocalTime startTime) throws IOException {
+      System.out.print("Mittagspause hat gedauert (optional): ");
+      String mittagspauseDurationRaw = br.readLine();
+      Integer mittagspauseDuration = null;
+      if (mittagspauseDurationRaw != null && !mittagspauseDurationRaw.isBlank()) {
+         mittagspauseDuration = Integer.valueOf(mittagspauseDurationRaw);
+      }
+      System.out.print("Feierabend verschieben um (optional): ");
+      String zapfenstreichOffsetRaw = br.readLine();
+      Integer zapfenstreichOffset = null;
+      if (zapfenstreichOffsetRaw != null && !zapfenstreichOffsetRaw.isBlank()) {
+         zapfenstreichOffset = Integer.valueOf(zapfenstreichOffsetRaw);
+         showLoadingBarZapfenstreich(startTime, mittagspauseDuration, zapfenstreichOffset);
+         return;
+      }
+      System.out.print("Manuelle Uhrzeit Feierabend (optional): ");
+      String manualZapfenstreichRaw = br.readLine();
+      LocalTime manualZapfenstreich = null;
+      if (manualZapfenstreichRaw != null && !manualZapfenstreichRaw.isBlank()) {
+         manualZapfenstreich = LocalTime.parse(manualZapfenstreichRaw, TIME_FORMATTER);
+         showLoadingBarZapfenstreich(startTime, mittagspauseDuration, manualZapfenstreich);
+         return;
+      }
+      showLoadingBarZapfenstreich(startTime, mittagspauseDuration);
+   }
+
+
+   private static void parseParametersAndRun(String[] args) {
+      String nextArg = args[0];
+      if ("--help".equals(nextArg)) {
          printHelp();
          return;
       }
       verifyMinimumNumberOfArgs(args);
-      String nextArg = args[0];
       verifyTimeFormat(nextArg, "Erstes Argument");
       var startTime = LocalTime.parse(nextArg, TIME_FORMATTER);
       nextArg = args[1];
@@ -91,13 +161,12 @@ public class LoadingBar {
          return;
       }
       verifyTimeFormat(nextArg, "Argument nach " + DaySection.MITTAG.getParam());
-      var maxMittagspause = LocalTime.parse(nextArg, TIME_FORMATTER);
-      showLoadingBarMittagspause(startTime, maxMittagspause);
+      var manualMittagspause = LocalTime.parse(nextArg, TIME_FORMATTER);
+      showLoadingBarMittagspause(startTime, manualMittagspause);
    }
 
 
    private static void handleZapfenstreich(String[] args, LocalTime startTime) {
-      Integer lunchDuration = null;
       if (args.length == 2) {
          showLoadingBarZapfenstreich(startTime);
          return;
@@ -105,6 +174,7 @@ public class LoadingBar {
       String nextArg = args[2];
       LocalTime maxZapfenstreich = null;
       int endTimeOffset = 0;
+      Integer lunchDuration = null;
       if (TIME_PATTERN.matcher(nextArg).matches()) {
          maxZapfenstreich = LocalTime.parse(nextArg, TIME_FORMATTER);
       } else if (OFFSET_PATTERN.matcher(nextArg).matches()) {