how to do sample flowchart for this problem?

The following specific tasks must be completed by the Group: Design an intelligent Robotic vehicle that performs the following tasks: On system initialisation the vehicle should move in a forward direction in a straight path. The locomotion for the vehicle should be implemented using two stepper motors driven in full step mode by using port D of the microcontroller interfaced with ULN2803 Darlington Driver. The path that the vehicle should follow is marked by a number of markers implemented by using strips of black tape. These markers are placed at random intervals along the path. The vehicle should be able to detect and count these markers. The sensing of these markers should be implemented by using a photo-reflective optical sensor mounted at most appropriate position underneath the vehicle. This sensor is to be connected to Port C bit 0 (bit RCO). Every time one of these markers is encountered, the system should respond by giving an audio signal through a Piezo Buzzer that is connected to Port C bit 7. A visual response should also be given by a single LED that is connected to Port C bit 6. Every marker encountered by the vehicle in its path should be counted and the accumulated value of these should be given as an audio and visual feedback. The number of audio (buzzer sound) and visual displayed is the number of encountered marker. This can displayed as a message on the internal LCD display on the controller board and/or as LED signal on any available LED on the controller board