Tiêu đề Ảo ảnh hình vuông bị thiếu Ảo ảnh quang học tam g

A simple geometry illusion, rearrange the pieces as shown in the pictures to make the gap in the middle appear or disappear. It may be a bit of a tight fit in the configuration with the open but.

Print x2 copies of the “L-Piece”

Print settings don't matter all too much