The development of curtains has undergone many changes, the most obvious changes are reflected in the material of the curtains. In the beginning, the window was only used to cut or leave very rough holes in the wall and ceiling or the skylight opening of the Indian conical tent. The basic use is only limited to ventilation, these holes and The openings are often covered with a woven fabric of beast skin or grass. The hides and mats are the earliest forms of curtains, and because of the aesthetics of the mats, such window coverings have been passed down to the present. In the summer in the south, families will hang curtains on the mats and take them cool.