Hexcasting - Mage tower stairs spell circle

Me and some friends had the idea to create a mage tower. And I wanted to create magic stairs using a hexcasting spell circle. Sadly the mage tower got abandoned by my friends. Still, I wanted to complete the spell circle. It is done. No cleanup - the spell circle extends beyond the target bounds. No real tower since it got abandoned. (The extra slate popping up at the end of the video was me right-clicking by accident.)