1<div class="stair">
2 <div class="cube">
3 <div class="face cube__front"></div>
4 <div class="face cube__back"></div>
5 <div class="face cube__right"></div>
6 <div class="face cube__left"></div>
7 <div class="face cube__top"></div>
8 <div class="face cube__bottom"></div>
9 </div>
10 <div class="cube">
11 <div class="face cube__front"></div>
12 <div class="face cube__back"></div>
13 <div class="face cube__right"></div>
14 <div class="face cube__left"></div>
15 <div class="face cube__top"></div>
16 <div class="face cube__bottom"></div>
17 </div>
18 <div class="cube">
19 <div class="face cube__front"></div>
20 <div class="face cube__back"></div>
21 <div class="face cube__right"></div>
22 <div class="face cube__left"></div>
23 <div class="face cube__top"></div>
24 <div class="face cube__bottom"></div>
25 </div>
26 <div class="cube">
27 <div class="face cube__front"></div>
28 <div class="face cube__back"></div>
29 <div class="face cube__right"></div>
30 <div class="face cube__left"></div>
31 <div class="face cube__top"></div>
32 <div class="face cube__bottom"></div>
33 </div>
34 <div class="cube">
35 <div class="face cube__front"></div>
36 <div class="face cube__back"></div>
37 <div class="face cube__right"></div>
38 <div class="face cube__left"></div>
39 <div class="face cube__top"></div>
40 <div class="face cube__bottom"></div>
41 </div>
42 <div class="cube">
43 <div class="face cube__front"></div>
44 <div class="face cube__back"></div>
45 <div class="face cube__right"></div>
46 <div class="face cube__left"></div>
47 <div class="face cube__top"></div>
48 <div class="face cube__bottom"></div>
49 </div>
50 <div class="cube">
51 <div class="face cube__front"></div>
52 <div class="face cube__back"></div>
53 <div class="face cube__right"></div>
54 <div class="face cube__left"></div>
55 <div class="face cube__top"></div>
56 <div class="face cube__bottom"></div>
57 </div>
58</div>