"These arrows are part of the building blocks that get to that point. I mean technically at its most basic programing is just patterns of zero and one, but that's like telling you to start building a pyramid with atoms. We're skipping the atom stage and going right to the building blocks stage. So while you can build a pyramid with toy foam blocks, building one that can withstand weight needs not only more solid blocks like stone, but also needs support engineering and math. But when you learn to build a pyramid, you start with soft foam blocks or coins. You learn the simplified easier to manipulate version first to understand the basics. That's what the arrows are. They're foam building blocks."