| <svg xmlns='http://www.w3.org/2000/svg'> | |
| <rect width='100' height='100' fill='black'> | |
| <animateColor attributeName="fill" by='green' dur='3s' fill='freeze' /> | |
| </rect> | |
| <text x='10' y='120'>The rect should animate from black to green over 3 seconds</text> | |
| </svg> |
