private void createKeyFrame(){ 
        frame = new KeyFrame(Duration.millis(msDelay), 
                             e -> stepFunction()); 
        anim = new Timeline(); 
        anim.setCycleCount(Timeline.INDEFINITE); 
        anim.getKeyFrames().add(frame); 
        anim.play(); 
    } 

    private void changeSpeed(){ 
        msDelay=ms/FRAMES_PER_SECOND; 
        anim.stop(); 
        anim.getKeyFrames().remove(0); 
        frame = new KeyFrame(Duration.millis(msDelay), 
                             e -> stepFunction()); 
        anim.getKeyFrames().add(frame); 
        anim.play(); 
    } 

    @Override 
    public void update () { 
        Cell[][] gridClone = cloneGrid(grid); 
        Random r = new Random(); 
        for (int i = 0; i < grid.length; i++){ 
            for(int j = 0; j<grid[0].length; j++){ 
                if(grid[i][j].getState() == 2){ 
                    gridClone[i][j].setStateandColor(0,burnt); 
                }else if(grid[i][j].getState() == 1 && fireNeighbors(grid[i][j]) > 0 && r.nextInt(100) < probCatchesFire){ 

    @Override 
    public void update () { 
        Cell[][] gridClone = cloneGrid(grid); 
        for (int i = 0; i < grid.length; i++){ 
            for(int j = 0; j<grid[0].length; j++){ 
                int live = liveNeighbors(grid[i][j]); 
                if(live == SPAWN && grid[i][j].getState() == 0){ 
                    gridClone[i][j].setStateandColor(1, alive); 
                } 

   public List<Cell> checkNeighborsAll(Cell cell) { 
      int i = cell.getRow(); 
      int j = cell.getCol(); 
      int[] a = {-1,-1,-1,0,0,1,1,1}; 
      int[] b = {-1,0,1,-1,1,-1,0,1}; 
      List<Cell> neighbors = new ArrayList<Cell>(); 

   public List<Cell> checkNeighborsCardinal(Cell cell) { 
      int i = cell.getRow(); 
      int j = cell.getCol(); 
      List<Cell> neighbors = new ArrayList<Cell>(); 

       List<Cell>neighbors = checkNeighborsCardinal(cell); 
       List<Cell>empty = new ArrayList<>(); 
       for(int i=0;i<neighbors.size();i++){ 
          if(neighbors.get(i).getState()==0){ 
             empty.add(neighbors.get(i)); 
          } 
       } 

        List<Cell>neighbors = checkNeighborsCardinal(cell); 
        List<Cell>empty = new ArrayList<>(); 
        List<Cell>fish = new ArrayList<>(); 
        for(int i=0;i<neighbors.size();i++){ 
            if(neighbors.get(i).getState()==0){ 
                empty.add(neighbors.get(i)); 
            } 

        else if((row+col)%2==1){ 
            //upwards triangles 
                xCoordinates[0]=xPosition/2; 
                yCoordinates[0]=yPosition+height;  
                xCoordinates[1]=xPosition/2+width/2;  
                yCoordinates[1]=yPosition; 
                xCoordinates[2]=xPosition/2+width; 

        if((row+col)%2==0){ 
            //downward triangles 
                xCoordinates[0]=xPosition/2; 
                yCoordinates[0]=yPosition;  
                xCoordinates[1]=xPosition/2+width;  

    private List<Cell> setupCell(){ 
        List<Cell> cellStart = new ArrayList<Cell>(); 
 
        for(int i = 0; i < rowCount*colCount; i++){ 
            if(i<emptyCount){ 
                cellStart.add(new PredatorPreyCell(0,free,-1)); 
            }else if(i < emptyCount + sharkProbCount){ 
                cellStart.add(new PredatorPreyCell(1,shark,maxsE)); 
            }else{       
                cellStart.add(new PredatorPreyCell(2,fish,-1)); 
            } 
        } 
        return cellStart; 
    } 

    private List<Cell> setupCell(){ 
        List<Cell> cellStart = new ArrayList<Cell>(); 
 
        for(int i = 0; i < rowCount*colCount; i++){ 
            if(i<emptyCount){ 
                cellStart.add(new Cell(0,free)); 
            }else if(i < emptyCount + redProbCount){ 
                cellStart.add(new Cell(1,red)); 
            }else{ 
                cellStart.add(new Cell(2,blue)); 
            } 
        } 
        return cellStart; 
    } 

        private TriangleCell[][] cloneTriangle(Cell[][]a){ 
            TriangleCell[][]b = new TriangleCell[a.length][a[0].length]; 
            for(int i=0;i<a.length;i++){ 
                    for(int j=0;j<a[0].length;j++){ 

        private Cell[][] cloneSquare(Cell[][]a){ 
           Cell[][] b = new Cell[a.length][a[0].length]; 
            for (int i = 0; i < a.length; i++) { 
                for (int j = 0; j < a[0].length; j++) { 

        private HexagonalCell[][] cloneHexagonal(Cell[][]a){ 
           HexagonalCell[][]b = new HexagonalCell[a.length][a[0].length]; 
           for(int i=0;i<a.length;i++){ 
              for(int j=0;j<a[0].length;j++){ 

            grid[cell.getRow()][cell.getCol()]=new PredatorPreyCell(0,free,cell.getX(),cell.getY(),cell.getRow(),cell.getCol(),-1); 
            empty.add(grid[cell.getRow()][cell.getCol()]); 
            grid[selected.getRow()][selected.getCol()]=cell;  
            cell.setXandY(selected.getX(), selected.getY()); 
            cell.setRowandCol(selected.getRow(), selected.getCol()); 

             grid[cell.getRow()][cell.getCol()]=new PredatorPreyCell(2,fish,cell.getX(),cell.getY(),cell.getRow(),cell.getCol(),-1); 
             grid[selected.getRow()][selected.getCol()]=cell;  
             cell.setXandY(selected.getX(), selected.getY()); 
             cell.setRowandCol(selected.getRow(), selected.getCol()); 

            grid[cell.getRow()][cell.getCol()]=new PredatorPreyCell(0,free,cell.getX(),cell.getY(),cell.getRow(),cell.getCol(),-1); 

             grid[cell.getRow()][cell.getCol()]=new PredatorPreyCell(0,free,cell.getX(),cell.getY(),cell.getRow(),cell.getCol(),-1); 

    private void displayHexagonalTiles(){ 
        gc.setStroke(Color.BLUE); 
       for(int i=0;i<myGrid.length;i++){ 
          for(int j=0;j<myGrid[0].length;j++){ 
                          Cell tempCell=myGrid[i][j]; 
                          gc.setFill(tempCell.getColor()); 
 
                gc.strokePolygon(((HexagonalCell)myGrid[i][j]).getXCoordinates(), ((HexagonalCell)myGrid[i][j]).getYCoordinates(), 6); 
                gc.fillPolygon(((HexagonalCell)myGrid[i][j]).getXCoordinates(), ((HexagonalCell)myGrid[i][j]).getYCoordinates(), 6); 
                 
             } 
          } 
    } 

    private void displayTriangleTiles(){ 
        gc.setStroke(Color.BLUE); 
        for(int i=0;i<myGrid.length;i++){ 
                for(int j=0;j<myGrid[0].length;j++){ 
                                 
                                Cell tempCell=myGrid[i][j]; 
                                gc.setFill(tempCell.getColor()); 
 
                                gc.strokePolygon(((TriangleCell)myGrid[i][j]).getXCoordinates(), ((TriangleCell)myGrid[i][j]).getYCoordinates(), 3); 
                                gc.fillPolygon(((TriangleCell)myGrid[i][j]).getXCoordinates(), ((TriangleCell)myGrid[i][j]).getYCoordinates(), 3); 
                                 
                        } 
                } 
    } 

    private void createSquareGrid(){ 
       Random r = new Random(); 
        grid = new Cell[rowCount][colCount]; 
        int w = width/colCount; 
        int h = height/rowCount; 
        for (int i = 0; i < grid.length; i++){ 
            for(int j = 0; j<grid[0].length; j++){ 
                int randNum = r.nextInt(100); 
                if(randNum < probAlive){ 

    private void createTriangleGrid(){ 
        Random r = new Random(); 
        grid = new Cell[rowCount][colCount]; 
        int w = width/colCount; 
        int h = height/rowCount; 
        for (int i = 0; i < grid.length; i++){ 
            for(int j = 0; j<grid[0].length; j++){ 
                int randNum = r.nextInt(100); 
                if(randNum < probAlive){ 

    private void placeCells(List<Cell> cells){ 
        List<Cell> cellStart = cells; 
        int w = width/colCount; 
        int h = height/rowCount; 
         
        Random r = new Random(); 
        grid = new Cell[rowCount][colCount]; 
        for (int i = 0; i < rowCount; i++){ 
            for(int j = 0; j<colCount; j++){ 
                int randNum = r.nextInt(cellStart.size()); 
                Cell c = cellStart.get(randNum); 
                c.setRowandCol(i, j); 
                c.setXandY(i*w, j*h); 
                grid[i][j] = c; 
                cellStart.remove(randNum); 
            } 
        } 
    } 

    private void placeCells(List<Cell> cells){ 
        List<Cell> cellStart = cells; 
        int w = width/colCount; 
        int h = height/rowCount; 
 
        Random r = new Random(); 
        grid = new Cell[rowCount][colCount]; 
        for (int i = 0; i < rowCount; i++){ 
            for(int j = 0; j<colCount; j++){ 
                int randNum = r.nextInt(cellStart.size()); 
                Cell c = cellStart.get(randNum); 
                c.setRowandCol(i, j); 
                c.setXandY(i*w, j*h); 
                grid[i][j] = c; 
                cellStart.remove(randNum); 
            } 
        } 
    } 

    private void moveAllFish(){ 
       for(int i=0;i<grid.length;i++){ 
          for(int j=0;j<grid[0].length;j++){ 
             if(grid[i][j].getState()==2&&!((PredatorPreyCell)grid[i][j]).getHasMoved()){ 

    private void moveAllSharks(){ 
        for(int i=0;i<grid.length;i++){ 
            for(int j=0;j<grid[0].length;j++){ 
                    if(grid[i][j].getState()==1&&!((PredatorPreyCell)grid[i][j]).getHasMoved()){ 

                    grid[i][j] = new Cell(2,burning,i*w,j*h,i,j); 
                }else{ 
                    grid[i][j] = new Cell(1,burnable,i*w,j*h,i,j); 
                } 

                    grid[i][j] = new Cell(0,death,i*w,j*h,i,j); 
                }else{ 
                    grid[i][j] = new Cell(1,alive,i*w,j*h,i,j); 
                } 

             ((PredatorPreyCell)(grid[cell.getRow()][cell.getCol()])).setHasMoved(true); 
             grid[selected.getRow()][selected.getCol()]=cell;  
             cell.setXandY(selected.getX(), selected.getY()); 
             cell.setRowandCol(selected.getRow(), selected.getCol()); 

            ((PredatorPreyCell)(grid[cell.getRow()][cell.getCol()])).setHasMoved(true); 
            grid[selected.getRow()][selected.getCol()]=cell;  
            cell.setXandY(selected.getX(), selected.getY()); 
            cell.setRowandCol(selected.getRow(), selected.getCol()); 

                    grid[i][j] = new TriangleCell(1,alive,i*w,j*h,w,h,i,j); 

                    grid[i][j] = new TriangleCell(0,death,i*w,j*h,w,h,i,j);