1.The condition was chosen that there should be an interval of at least 1.5 hour in between recording sessions.2. The recordings were made during the daytime (11am - the earliest-6pm - the latest).3. The sound sources were selected by activity - the most active of them were recorded.4. The places where recordings were made were sky photographed by a mobile phone camera as a light source.5. Every sound recordings has its own photo of lightness at that particular moment.6. 24 recording situations were collected at different time of the day and with different intensity of light. A. All recordings are grouped by their photo of light - from the lightest to the darkest. They're connected into one whole.B. All recordings loose their succession in a common entirety which becomes a documentary of 5 days. C. Final entirety of sounds is presented in its most natural form - as a cycle of day (sun is rising in the morning and sets in the evening) 'the final result is dual'. (Darius Ciuta, March 2013).