class="bi x0 y0 w1 h1"
class="bi x1 y0 w2 h2"
class="bi x2 y1 w3 h3"
class="bi x1 y1 w4 h4"
class="bi x2 y1 w5 h3"
class="bi x3 y2 w6 h5"
class="bi x2 y3 w7 h5"