An apparatus for shading a window, wherein the window has a right top corner and a top left corner, comprising a rod element, which has a proximate end and a distal end and is disposed along a lateral axis substantially parallel to a lateral window axis. The apparatus further has a spring element, having a first end mechanically coupled to the rod element at the proximate end of the rod element, wherein the spring element is adapted to provide a spring constant force between the rod element and the top left corner of the window.