An image is represented by an m x n integer grid image where image[i][j] represents the pixel value. You are also given three integers sr, sc, and color. You should perform a flood fill on the image starting from the pixel image[sr][sc]. To perform a flood fill, consider the starting pixel, plus any pixels connected 4-directionally to the starting pixel of the same color as the starting pixel, plus any pixels connected 4-directionally to those pixels (also with the same color), and so on. Replace the color of all of the aforementioned pixels with color.

• A 2D integer matrix image.
• Starting row sr and column sc.
• New color.

Input: image = [[1, 1, 1], [1, 1, 0], [1, 0, 1]], sr = 1, sc = 1, color = 2
Output: [[2, 2, 2], [2, 2, 0], [2, 0, 1]]