Build the four corners in a deliberate order
One closed cut outline, eight score segments, four glue ears.
Read the marks first
The dark solid outline is the cut boundary. Blue dashed segments are score/fold lines. Pale amber regions are glue tabs. Labels may be hidden for a cleaner file; the geometry stays the same. The file does not configure a cutting machine: line colours, dash styles and grouped IDs are only drawing information.
A small trial build
Use the sheet export's 40 mm check line to check the scale of your output. Cut around the outside outline, then score along the eight dashed segments using a method suited to your paper. The four long segments surround the base; the four shorter segments hinge the glue ears.
Raise the front and back walls. Fold their two ears inward at each end. Raise the left and right side walls over the ears, attaching each ear to the inside of the side wall. Hold the corners square while your chosen adhesive sets. The shaded tabs show where attachment happens; no adhesive or material specification is supplied.
Keep the setup, not just the picture
JSON keeps the dimensions and sheet options for editing later. Text notes list the nominal sizes and build sequence. SVG is the drawing. Nothing is automatically saved in this tab, and closing it discards Undo history. Keep a JSON file before leaving.
This is a paper craft prototype, not food-contact packaging, a load-rated container or a production-certified dieline.