Correction On A Staircase [Part 1

6 mins 10 secs

53 mins 54 secs

5 mins 18 secs

32 mins 49 secs

7 mins

30 mins 13 secs

26 mins 28 secs

28 mins

12 mins 35 secs

13 mins 42 secs

8 mins

1 min 16 secs

20 secs

10 mins 58 secs

12 mins 55 secs

22 mins 42 secs

8 mins 13 secs

2 mins 20 secs

20 mins 35 secs

5 mins 8 secs

13 mins 28 secs

7 mins 10 secs

28 secs

2 mins 44 secs

3 mins

8 mins 36 secs

6 mins 11 secs

7 mins 55 secs

20 secs

8 mins 37 secs

20 secs

34 secs

31 secs

8 mins 4 secs

8 mins 4 secs

12 mins 58 secs

13 mins

54 secs

5 mins 11 secs

10 mins