function to plot indoor pickers following delivery

function that animates a group of pickers delivering to open containers and returning to start point

call: RoutePlaner(A,B)
where A:amount pickers B:amount open containers.
This is as support function that animates a group of indoor pickers delivering items to open containers and returning to respective start points.

It's intended to be used as part of a program to simulate down time caused by traffic delays when an indoor grid is congested.

When pair pickers too close each other, the one further away from next open container aiming at gives way to the
picker closer to respective next open container.