You can find it on the East Coast as well as the West Coast, and often the symbols are very well preserved, so each of these symbols has four bits -- it's a four-bit binary word -- you draw these lines in the sand randomly, and then you count off, and if it's an odd number, you put down one stroke, and if it's an even number, you put down two strokes.
西海岸でも 東海岸でも みつかり とてもよく保存されている シンボルも よくみかけます それぞれのシンボルは４ ビットです-- ４ビットの２進法のワードです まず これらの線をランダムに砂に描いて数えます 奇数だったら 縦線を１本 偶数だったら 縦線を２本書きます