I am trying to flip an image horizontally that is passed as a parameter to my function. I cannot use JES functions. I have the below code. What am I doing wrong?

```
height = len(image)
width  = len(image[0])

for row in range(height):
    for col in range(width//2):
        srcPixel = image[row][col]
        tgtPixel = image[width - col - 1][row]
        tmpPixel = srcPixel
        srcPixel = tgtPixel
        tgtPixel = tmpPixel
return True

```