Draw 11 regular pentagons on your cardboard. In case you don't know, a regular pentagon is a pentagon that has equal sides.
The sides of the pentagons I made are 6cm long (2.36 inches) but this is up to you anyway. The most important thing is that all the pentagons must be equal. Try to be as accurate as possible!
In case you don't remember how to draw a perfect pentagon (I didn't), take a look at this video.
I first drew it on a piece of cardstock, cut it, and drew its outline on the cardboard multiple times. Drawing them was much faster this way.
Now draw 5 smaller pentagons in each of your 11 pentagons. They need to have a distance of about 6 mm (0.23 inches) from each other, as you can see in the first photo.
All you have to do is measuring 6mm from the the sides and trace a line.
These smaller pentagons must be one smaller than the other.
When you are finally done drawing them, cut them very carefully using a cutter.
I decided to remove the central pentagon, but you can keep it if you like.
This is the longest step to make, but not very difficult! ;)