function getNewColors(oldState,newState)
  local ret = {}
  if oldState ~= newState then
      for i=1,16,1 do
        local bit = bit.blshift(1,i-1)
        if not bit.band(bit,newState) and bit.band(bit,oldState) then table.insert(ret,bit) end
      end
    end
  end
  return ret
end