Appointement Calendar. Color appoint depend from status

Hi,

How we can customize appoint. calendar for the activity (task) for follow goal:

If user set status 1 - in the appointment we must see 'green' task

If user set status 2 - in the appointment we must see 'red' task.

in other words we have to set color in the appointment depend from status of the tasks.

How we can do this?