How to create a tessellation

What we need to do a tessellation. What we need is an index card and some scissors. A tessellation is pretty simple you just need a pattern. That pattern needs to fit together without gaps. You could be creative like you can invent your own shape. I’m doing a fox face on my shirt and it coming out nice. There are different tessellations some even look 3-D and they are cool .One tessellation I like was old men sitting behind one another. I would like to do that one but I’m not that good a drawing many stuffs.