and also allow for extension of the material to obscure more of the opening 40 the material forming the shade 16 may be elastic or inelastic as desired also the material forming the shade 16 may be opaque to varying degrees translucent or even transparent if desired the shade 16 may comprise one or more holes therethrough for viewing communicating with persons on the opposite side of the shade 16 etc the shade 16 may be formed of a single piece of material or may comprise at least two pieces of material disposed 180 degrees out of phase the at least two pieces of material may be alternatingly opaque and transparent and disposed such that when the shade 16 is transposed the amount of light transmitted through the shade 16 can be varied the pitch and opacity differences between the transparent and opaque areas can be varied as desired if desired the shade 16 may comprise a flexible panel without pleats 18 such a panel would be comprised of any flaccid material which can be accumulated or gathered by known means to reveal more or less of the opening 40 as desired for example a flat panel embodiment of the shade 16 may be rolled around a tube in known fashion as illustrated for example by u s pat no 4 951 730 iss aug 28 1990 to hsu the attachments 19 are disposed on the shade 16 in any pattern which allows for operation and movement of the shade 16 preferably the attachments 19 are spaced apart along the length of the shade 16 in a straight line this disposition not only accommodates convenient attachment 19 of the drawstrings 14 to the attachments 19.