I need help in Robotix

hello all
thanks for the nice forum
I got problem with my robot
I have done 2 tasks and the third one is left coz I don't know how to do it
so plz help

this what i should do :

Task 3

Aims: Implementation of Behaviour Control. Use of Infra Red (IR) beacons.

The robot will implement a four-action Behaviour Control system. The actions are:

Cruise (lowest priority):
Go straight forwarded.

Follow (low priority):
Head towards the brightest light source. It will only do this if the light is above the general ambient light level.

Beacon (medium priority):
Listen out for an IR beacon. If the beacon is a warning beacon, back away while still facing it. If the beacon is a guide beacon, head towards it.

A warning beacon will emit the letter 'B' approximately ten times a second via its infrared transmitter. In a similar way a guide beacon will emit a letter 'G'. If no letter is received for at least 2 seconds then it can be assumed that no beacons are near by. There will only be one beacon transmitting at any given time.

Escape (high priority):
Use bump sensors to avoid obstructions to the front .

You will be asked to demonstrate the operation of the robot in a situation were all four activities will be fully tested. As well as all four activities behaving correctly, the system must switch between activities consistent with the principles of behaviour control.



plzzzzzzzzzz

you should take a course