How sand artists create massive temporary murals at Pismo Beach festival

We're all the way from Ireland, got booked in, we're here for the second time for the now for the second event, the second edition of the Pismo Beach Arts Festival. Yeah, working away, great fun. Today I left a little bit of a Celtic design here, it's the so-called Triquetra, it's the Trinity knot, so if you have a look with the shading, it's an endless path which goes over and on and over and on and you always end where you started. So it's eternity, it's like symbolizing the circle of life. Yeah, it needs always a lot of work on the desk. So if you have a geometrical piece like this, you can't just freehand construct it, so you need to do the whole drawing on paper, I do it on A3, and then you have to work out a geometrical construction plan for the beach, how to proceed, because you have to do it in certain steps, especially with an over and under effect. I wanted to do one with six trinity knots, which I had prepared, but because there was a big delay until we had the canvas. So I just changed it and we were kind of, yeah, a bit out of the blue, but it turned out nice, I think. Yeah, tomorrow, I don't know if you followed the last year's festival. I was the one doing that Mayan temple, the optical illusion where I was walking up the stairs, even though it was on the flat, and this time I have another optical illusion, but this time we're going underground, so I'm going down the stairs. You can, around the corner, there's a door, not a room, and there's a ladder sticking out with a shadow, so we'll see how it works out.