class="bi x0 y0 w1 h1"
class="bi x0 y1 w0 h2"
class="bi x0 y2 w2 h3"
class="bi x0 y3 w3 h4"
class="bi x0 y4 w4 h5"
class="bi x0 y4 w5 h5"
class="bi x0 y5 w4 h6"