Carpark Spaces

[oo7ml]

Hi, i need to draw a carpark that has 2 levels with 300 spaces on each level (600 in total).

My client (friend) needs to carry out resurfacing work on the carpark, so his work needs to be carried out in phase... and he wants to show this to his client, so his client will see the availability of car parking spaces through the resurfacing works.

My friends wants to mark the available spaces in green and the unavailable spaces (which he'll be working on) in red.

The spaces will need to change colour throughout the phases of the works, and this is ultimately what my friend wants to show his client.

QUESTION

What is the best way to show the colour of the car park spaces through the different phases of the work. I will be using Scene Animation to showcase the phases, but i don't want to have to create a scene each time each of the 600 spaces changes colour. What is the best way to show 10-20 spaces changing colour at the time?

Thanks in advance for your help, it's much appreciated.