class="bi x0 y0 w1 h1"
class="bi x1 y1 w2 h2"
class="bi x2 y2 w3 h3"
class="bi x3 y0 w4 h1"
class="bi x2 y3 w5 h4"
class="bi x4 y0 w1 h1"
class="bi x3 y4 w6 h3"