class="bi x0 y0 w1 h1"
class="bi x1 y1 w2 h2"
class="bi x0 y2 w3 h3"
class="bi x1 y3 w2 h4"
class="bi x0 y4 w3 h5"
class="bi x1 y5 w2 h6"
class="bi x0 y5 w3 h7"
class="bi x1 y6 w2 h8"
class="bi x0 y7 w3 h9"