Added new colours, sort function, some food stuff
Added new colours, sort function, some food stuff

They now have fancy colours, which I can’t even really tell what colour
they are since i’m using flux. The array is sorted by size, so the
small agents should be the last to be drawn.

To experiment I added back in food stuff. Both static food and
randomised each turn food create a very bland pattern of going from
left to right for all agents. compared with no food where you get a
variety of left to right and vice versa, as well as frequent lane
changing behaviour. The food stuff is currently commented out.

Henry-E/snake-visualisation,Henry-E/snake-visualisation