pico-8 cartridge // http://www.pico-8.com
	version 18
	__lua__
	
	cell = {
	  center = 64,
	  startx = 64,
	  endx = 64,
	  starty = 64,
	  endy = 64,
	}
	
	function draw_loop(startx,endx,starty,endy)
	  for dx=startx,endx do
	    for dy=starty,endy do
	      pset(dx,dy,1+rnd(15))
	    end
	  end
	end
	
	function derive_bounds(i)
	  cell.startx -= i
	  cell.starty -= i
	  cell.endx += i
	  cell.endy += i   
	end
	
	function _init()
	  cls()
	end
	
	function _update60()
	  cls()
	end
	
	function _draw()
	  draw_loop(cell.startx,cell.endx,cell.starty,cell.endy)
	  r = rnd(20)
	  if ( r > 19 ) then
	    derive_bounds(1)
	  end
	end
	
	
	__gfx__
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