Covered structure with an expandable/closeable exterior

A structure with a retractable cover comprising:

• a plurality of poles, each of said poles having a top end and a bottom end;
• a plurality of crossbeams joined to said plurality of poles;
• a plurality of roof rods, each of said roof rods having a first end and a second end;
• a winding device;
• a pull cord;
• a pulley block;
• and
• a collapsible frame comprising a cover,
• wherein
• said first end of each of said roof rods is joined to and contiguous to said top end of one of said poles,
• all of said second ends of said roof rods are contiguous to one another and joined to one another at an apex,
• one of said roof rods is a first roof rod having an open channel in a longitudinal direction of said first roof rod,
• said pulley block is slideably mounted in said open channel,
• said collapsible frame is joined to said pulley block,
• said winding device is joined to said pole to which said first roof rod is joined, and
• said pull cord connects said winding device with said collapsible frame through said pulley block, and
• wherein operation of said winding device in one direction results in extension of said collapsible frame and said cover and in movement of said pulley block in said open channel in a direction towards said apex, and wherein operation of said winding device in an opposite direction results in retraction of said collapsible frame and said cover and in movement of said pulley block in said open channel in a direction towards said pole to which said first roof rod is joined.