Black the part in two

11 secs

4 mins 32 secs

18 secs

4 mins 25 secs

1 min 53 secs

1 min 38 secs

2 mins 22 secs

3 mins 9 secs

3 mins

6 mins 2 secs

10 mins 16 secs

5 secs

46 secs

1 min 5 secs

5 mins 8 secs

6 mins 1 sec

15 mins 52 secs

8 mins 33 secs

10 mins 20 secs

59 secs

7 mins

11 mins 54 secs

6 mins 38 secs

5 mins 26 secs

5 mins 55 secs

6 mins 51 secs

9 mins 12 secs

1 min 9 secs

13 secs

28 secs

1 min 13 secs

6 mins 38 secs

1 min 8 secs

9 mins 56 secs

1 min 30 secs

3 mins

3 mins

2 mins

1 min 21 secs

6 mins