Place your white chalk mark textures here as:

chalk_mark_dot.png
chalk_mark_cross.png
chalk_mark_arrow_up.png
chalk_mark_arrow_up_right.png
chalk_mark_arrow_right.png
chalk_mark_arrow_down_right.png
chalk_mark_arrow_down.png
chalk_mark_arrow_down_left.png
chalk_mark_arrow_left.png
chalk_mark_arrow_up_left.png

Use 16x16 PNG files with transparent backgrounds. Keep marks white or light gray; the mod applies the block color automatically.
