With the development of information technology, more and more people are obsessed with mobile phones. People have missed too much goodness of life by staring at the mobile phones. In cope with this problem, we designed an awning. Wonderful shadow will be formed when the Sunlight is projected on the ground through the awning. According to the optical principle of moire fringes, we superimpose two layers of grid plates to form an awning , which projects moire fringes onto the ground with the help of sunlight, forming some interesting shadows . In addition, we choose a kind of humidity sensitive material to make the grid plate. When the surrounding humidity rises, the grid plate deforms and moire stripes are formed. The degree of deformation is different with different humidity, so moire fringe can be changed. Crowd gathering can raise the humidity around. In downtown areas, due to routines of people, the pedestrian volume is different in different time periods, with the increase of crowd density ，the humidity of air changes. And the humidity difference of air on both sides of the grid brings about the change of Moire fringe .The device is to remind people of the goodness of life. Don't be infatuated with the Internet society and ignore what in front of us.