NEED MATLAB CODE

Need MATLAB code for imfill and bwdist

USING ALGORITHM, NO BUILT-IN FUNCTIONS

imfill is to fill "holes" in image, performs a flood-fill operation on background pixels of the input binary image BW , starting from the points specified in locations

bwdist computes the Euclidean distance transform of the binary image BW. For each pixel in BW, the distance transform assigns a number that is the distance between that pixel and the nearest nonzero pixel of BW.