class="bi x0 y0 w1 h1"
class="bi x1 y1 w2 h2"
class="bi x0 y2 w3 h3"
class="bi x2 y3 w4 h4"
class="bi x3 y4 w5 h3"
class="bi x4 y5 w2 h4"
class="bi x5 y6 w6 h5"
class="bi x6 y7 w7 h6"
class="bi x0 y8 w8 h7"