AllanR
Easy as in there is all kinds of sliders that for a clever person maybe able to make a path like that.
But I think you onto something with the array thing,
1,0,0,0,1,1, 1's would be the space movement is allowed, and 0's would be the stop, or blocked of area.
And maybe I need to get rid of the drag and drop and use a mouse task of some kind.