Correction On A Staircase [Part 1

6 mins 10 secs

5 mins 18 secs

32 mins 49 secs

7 mins

7 mins

26 mins 27 secs

30 mins 13 secs

12 mins 35 secs

13 mins 42 secs

8 mins

20 secs

12 mins 55 secs

22 mins 42 secs

8 mins 13 secs

2 mins 20 secs

20 mins 35 secs

11 mins 19 secs

7 mins 39 secs

13 mins 28 secs

28 secs

11 mins 12 secs

17 mins 23 secs

2 mins 44 secs

8 mins 36 secs

6 mins 11 secs

7 mins 55 secs

12 mins

20 mins 44 secs

20 secs

31 secs

20 secs

34 secs

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31 secs

8 mins 4 secs

8 mins 4 secs

13 mins

15 mins 4 secs

54 secs

55 secs