class="bi x0 y0 w1 h1"
class="bi x1 y1 w2 h2"

class="bi x2 y2 w3 h3"
class="bi x3 y3 w4 h4"
class="bi x4 y4 w5 h5"
class="bi x5 y5 w6 h6"

class="bi x6 y6 w7 h7"
class="bi x4 y7 w8 h8"