When watching a job run and there are many tasks, it is visually difficult to follow the progress. It would be very helpful to highlight the active task with a different color to make it easier to follow. This is especially important when there are many tasks.
Furthermore, it would be nice to change the color of the completed tasks. So, there a job runs three tasks and gets stuck on the 4th task, it would be visually easy to identify what is going on.
This would be the "Visual" effect in VisualCron.