I buy A4 grid* sheets and then I want to draw!

Sheets are cheap, probably the cheapest on the market and you want to outline them, because if something goes wrong you can quickly throw it away without regret. I have a purse full of change for which I can buy checkered cards. The same, attached to a saddled horse, could have a cowboy.
I am rich.

From the cycle Northern Exposure, 21x28cm, marker, pastel on grid paper, 2017.

...

It all began with the search for a source of geometrical thinking. I wanted to paint geometric patterns. Of course, I came across Pythagoras and his tools, a ruler without graduation and compasses. The legacy of the Pythagoras "flowed" through the civilization of Islam and it seemed natural for me to find inspiration in Arab or Persian art. Philosophy of Pythagoras includes also mysticism, which interests me. It turned out that searching the source intuitively is faster. Then "checked" me checkered cards. With their help, creating all patterns, not only geometrical, is faster, just natural for me.