class="bi x0 y0 w0 h1"
class="bi x0 y0 w1 h2"
class="bi x0 y0 w1 h3"
class="bi x0 y0 w2 h4"
class="bi x0 y0 w3 h5"
class="bi x0 y0 w4 h6"
class="bi x0 y0 w5 h7"
class="bi x0 y0 w6 h8"