What I did was I made a black square. Then I got the lasso tool and went through the square. I got the piece that the lasso cut off and I placed it on the other side of the square. Then I went to the bottom of the square with the lasso tool and I lassoed through the bottom. I went up and down, up and down and ended in the bottom. Then with my lasso tool I lassoed all around the tessellation and pushing the option key, I slid the figure off and I had a second one. I went to paint and selected trace edges and I had a white figure. I went up with my finger tool and I made a new card and I started my tessellation.
A tessellation is a pattern that repeats itself but it is a picture. It looks better than other patterns that are like numbers. A tessellation is math, too because it's a pattern and patterns are math. It's math, too, because you need a square, which is a mathematical shape.