diff --git a/src/TM.java b/src/TM.java
index f0ec42c..d28afaf 100644
--- a/src/TM.java
+++ b/src/TM.java
@@ -16,13 +16,14 @@ public class TM {
 
     public TM(String codierung, String bandInitialisierung) {
         numberOfSteps = 0;
-        leseKopf = 0;
+        leseKopf = 15;
         band = new ArrayList<>();
         this.codierung = codierung;
         endZustand = 2;
         alphabet = new HashMap<>();
-        parse();
         initBand(bandInitialisierung);
+        initAlphabet();
+        parse();
 
     }
 
@@ -30,12 +31,17 @@ public class TM {
         while (!checkWin()) {
             try {
                 calcOneStep();
+                appendToBand();
                 System.out.println("Step: "+numberOfSteps);
                 System.out.println(this);
             } catch (TmException e) {
                 e.printStackTrace();
+                break;
             }
         }
+        System.out.println("Finished:");
+        System.out.println("Step: "+numberOfSteps);
+        System.out.println(this);
     }
 
     private void calcOneStep() throws TmException {
@@ -62,23 +68,16 @@ public class TM {
         if (str[4].length() == 2) {
             leseKopf += 1;
         } else {
-            leseKopf--;
+            leseKopf -= 1;
         }
         aktuellerZustand = str[2].length();
     }
 
     public String toString() {
         StringBuilder stringBuilder = new StringBuilder();
-
-        for (int i = 0; i < 15 - leseKopf; i++) {
-            stringBuilder.append('_');
-        }
         for (Character c : band) {
             stringBuilder.append(c);
         }
-        for (int i = 0; i < 15; i++) {
-            stringBuilder.append('_');
-        }
         return stringBuilder.toString();
     }
 
@@ -86,8 +85,22 @@ public class TM {
         return aktuellerZustand == endZustand;
     }
 
+    private void appendToBand() {
+        if(leseKopf - 15 < 0) {
+            for (int i = 0; i < 15 - leseKopf; i++) {
+                band.add(i,'_');
+            }
+        }
+        if ((band.size() - leseKopf) < 15 ) {
+            for (int i = 0; i < 15 - (band.size() - leseKopf); i++) {
+                band.add(band.size(),'_');
+            }
+        }
+    }
+
     private void parse() {
         String[] liste = codierung.substring(1).split("11");
+        funktionen = new String[liste.length][4];
         for (int i = 0; i < liste.length; i++) {
             funktionen[i] = liste[i].split("1");
         }
@@ -95,9 +108,15 @@ public class TM {
     }
 
     private void initBand(String bandInit) {
+        for (int i = 0; i < 15; i++) {
+            band.add('_');
+        }
         for (int i = 0; i < bandInit.length(); i++) {
             band.add(bandInit.charAt(i));
         }
+        for (int i = 0; i < 15; i++) {
+            band.add('_');
+        }
     }
 
     private void initAlphabet() {
diff --git a/src/TestClass.java b/src/TestClass.java
new file mode 100644
index 0000000..43f1389
--- /dev/null
+++ b/src/TestClass.java
@@ -0,0 +1,22 @@
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+public class TestClass {
+
+    TM turing;
+
+
+    @Test
+    void check() {
+        turing = new TM("101010001000100110100100000000000010001001100010010000100100110001010001010011000010001000001001011000010010000010010110000101000010100110000010000100000100001001100000100100000010010011000001010000010000100110000001000100000001010110000001010000001010011000000010010000000010010110000000101000000010101100000000100001000000001000010110000000010010000000001001001100000000101000001000010011000000000100001000000000101001100000000010010000000000100101100000000001001000000000001001011000000000010100000000001010110000000000010001010001001100000000000101000000000001010110000000000001001001000100110000000000001010000000000001000100",
+                "001000");
+        turing.start();
+    }
+
+    @Test
+    void check2() {
+        turing = new TM("101010001000100110100100000000000010001001100010010000100100110001010001010011000010001000001001011000010010000010010110000101000010100110000010000100000100001001100000100100000010010011000001010000010000100110000001000100000001010110000001010000001010011000000010010000000010010110000000101000000010101100000000100001000000001000010110000000010010000000001001001100000000101000001000010011000000000100001000000000101001100000000010010000000000100101100000000001001000000000001001011000000000010100000000001010110000000000010001010001001100000000000101000000000001010110000000000001001001000100110000000000001010000000000001000100",
+                "0001000");
+        turing.start();
+    }
+}