Creating a circular matrix with one input

[DPaul]

Previous posts have shown that whatever algorithm, you need a kind of "GPS" to navigate
through the different turns in the matrix. Fortunately these "moves" are predictable.
In order to help our TS even further, this is my GPS:
These are not coordinates, but index increments (decrements) that are associated with the move.

dictMoves = {'LEFT':(0,-1),'DOWN':(1,0),'RIGHT':(0,1),'UP':(-1,0)} 

And these are the "rails" you need to move along. (The vector is initiated dynamically, based on the seed number.

[2, 2, 2, 2, 4, 4, 4, 4, 6, 6, 6, 6]

Paul