insertion sort drawing

    private static boolean drawColumn (int[][] colorArray, int[] current, int column)
    {
        if (column >= colorArray.length)
        {
            //array is full
            return true;
        }

        for (int n = 0; n < current.length; n++)
        {
            colorArray[column][n] = current[n];
            //System.out.println(initial[n]);
        }
        return false;
    }

    private static int[][] insertionSort(int length, int[] current)
    {
        //do image for insertion sort
    //length is the desired number of columns to draw

    //current is an array of ints which represent colors
    //initially, current is already sorted

        int presentColumn = 0;              //track the traversal through the image array
        int rowCount = current.length;      //number of items to sort/number of rows in the
                        //image

        //shuffle the sorted array so we can do our own sorting
    current = randomShuffle(current);

        //array to be returned:
    //2d matrix of ints which represent colors (8-bit RGB by default)
        int[][] colorArray = new int[length][rowCount];

        boolean swapped;
        boolean fullArray = false;  //track whether colorArray is full

        //draw unsorted column
        fullArray = drawColumn(colorArray, current, presentColumn);
        presentColumn++;

        //do insertion sort
        for (int n = 1; n < (current.length); n++)
        {
            int elem = current[n];
            int indexHole = n;

            while(indexHole > 0 && current[indexHole - 1] > elem)
            {
                fullArray = drawColumn(colorArray, current, presentColumn);
                presentColumn++;
                current[indexHole] = current[indexHole - 1];
                indexHole--;
            }
            fullArray = drawColumn(colorArray, current, presentColumn);
            presentColumn++;
            current[indexHole] = elem;
        }

        //the elements are now sorted, but keep drawing until the end of the array is reached
        while (!fullArray)
        {
            fullArray = drawColumn(colorArray, current, presentColumn);
            presentColumn++;
        }
        return colorArray;
    }