class="bi x0 y0 w1 h1"
class="bi x0 y1 w1 h2"
class="bi x0 y2 w2 h3"
class="bi x0 y3 w3 h4"
class="bi x0 y4 w2 h5"
class="bi x0 y5 w2 h6"
class="bi x0 y6 w4 h7"
class="bi x0 y7 w4 h8"
class="bi x0 y8 w4 h9"