Published on January 24, 2017
Pull one or another of red cable branches to lift or lower the curtain that are represented by violet waved bars.
The lower end of each brown cable is fixed to lower side of the curtain. The upper end of each brown cable is fixed to multi-groove pulley. The brown cables pass through button-holes of the curtain.
The lower end of blue cable is fixed to the grey contra-weight.
The upper end of blue cable is fixed to the small green pulley.
The contra-weight is fixed to the red cable.
The video was made based on following picture:
