Fold the remaining top flap down and inside the box, aligning it with the center creases. Repeat with the bottom flap, ensuring the paper is tucked securely, then repeat the entire process to make a lid, perhaps with a slightly smaller piece of paper. Quick Tips

Unfold two opposite corners (e.g., top and bottom) and leave the other two sides folded down.

Fold all four corners into the center point to create a smaller square.