TODO.txt

->Add metrics window showing generation statistics
  DONE: Add class that collects timestamped events
  DONE: Gather stats
  DONE: Display stats to stdout
  DONE: Restore uncluttered step()/display() to inner loop
  ->Add updates per second average
  Display stats in window
Determine why killing all cells increases the step time
  With many live cells: Average duration for step: 595.242us
  All cells dead      : Average duration for step: 1.222828ms
  Hint: There is a logical short circuit with the dead case second
  Can we calculate in one step?

Change BigBoxFinder to use the live count method:
  Take this grid
    ..X.
    .X..
    ...X
    X.X.
  Create a running count of live cell for each row l-r
    0011
    0111
    0001
    1122
    Create a running count down each column
    0011
    0122
    0123
    1245
    Each cell contains the count of live cell a rectangle from the
    top-left to the cell includes. It's then simple to check any
    arbitrary rectangle for emptiness by taking the value for the
    bottom-right, subtracting the value for the left and top
    surrounding rectangles and adding the value for the top-left
    corner rectangle. Think size of union of two sets. An optimization
    to this is to test the size of squares using a binary search on
    the diagonal length.
Profile Grid.nextGeneration and calc in parallel
Add graph showing frames per second and live cell count
Widen window
Reject or prevent negative offsets in Grid.setOffsets
Upgrade Kotlin to 1.9 or later
Randomize orientation of added patterns: Reflect, Rotate
Colour a newly placed pattern yellow for the first cycle

DONE
----
DONE: Pick a box at random from the largest boxes when placing the pattern
DONE: Use a 2 cell border
    DONE: Add a block pattern and use to test the RandomBoxPicker
        DONE: Fix bug where patterns appear to be being added too close
            DONE: Reproduce by repeatedly adding dead spark coil
            This placement appears to produce immediate change
              xx
              xx xx
                 xx
            Solution? Use a 2 cell border
            Placing a pattern should not trigger an immediate change
DONE: Supply a minimum size to BigBoxFinder when placing a new pattern
WONT: Change BigBoxFinder to randomize order of starting pixels when restricting to a minimum
  box size to distribute boxes found evenly over the grid.
DONE: Change BigBoxFinder to take a minimum box size to find
    This allows the search to be restricted by starting the
    check at the minimum size
DONE: Auto select an empty area to place the new item
DONE: Turn on K2 compiler
DONE: Prevent premature glider death on add when the zone is busy
DONE: Fix Crab: When added it looks nothing like a crab