diff --git a/day4.cs b/day4.cs
index 9367ed2..4cbb5b5 100644
--- a/day4.cs
+++ b/day4.cs
@@ -48,8 +48,10 @@ class day4
 
         foreach(Field field in fields)
         {
-            field.markNumber("13");
+            field.markNumber("1");
             field.printField();
+            field.checkBingo();
+            
         }
 
 
@@ -76,19 +78,56 @@ class Field{
             {
                 if (bingoField[i, j].Contains(markNumber))
                 {
-                    bingoField[i, j] = $"[-{markNumber}-]";
+                    bingoField[i, j] = $"[X{markNumber}]";
                 }
             }      
         }
     }
-    public void checkBingo()
+    public bool checkBingo()
     {
         bool bingo = false;
-        int checkCounter = 0;
-        for(int i = 0; i < 5; i++)
-        {
+        int counter = 0;
+        int rowNr = 0;
+        int columnNr = 0;
+        
+            while( rowNr < 5) { 
+                for(int i = 0; i < 5;i++)
+                {
+                        if (bingoField[rowNr, i].Contains("X"))
+                        {
+                            counter++;
+                            if (counter == 5)
+                            {
+                                bingo = true;
+                        Console.WriteLine("Bingo");
+                                return bingo;
 
-        }
+                            }
+                        }
+                }
+            counter = 0;
+                rowNr++;
+            }
+            while (columnNr < 5)
+            {
+                for (int i = 0; i < 5; i++)
+                {
+                    if (bingoField[i, columnNr].Contains("X"))
+                    {
+                        counter++;
+                        if (counter == 5)
+                        {
+                            bingo = true;
+                        Console.WriteLine("Bingo");
+                        return bingo;
+
+                        }
+                    }
+                }
+            counter = 0;
+            columnNr++;
+            }
+            return bingo;   
     }
     public void printField()
     {