public void displayBoard() {
              for (int i = 0; i < Board.allMarkers.length; i++){
                  for (int j = 0; j < Board.allMarkers[i].length; j++) {
                      String currentMarker;
                      if ("_".equals(allMarkers[i][j])) {
                          currentMarker = " ";
                      }
                      else {
                          currentMarker = allMarkers[i][j];
                      }
                      if (i < 6){
                          System.out.print("|" + currentMarker);
                      }
                      else {
                          System.out.print(" " + currentMarker);
                      }
                  }
                  if (i < 6){
                      System.out.print("|\n");
                  }
             }
        }