draw a parabola

1:48

15:40

1:29

1:38

1:07

3:44

1:57

10:22

16:03

16:24

3:27

6:48

3:26

12:45

10:03

3:09

5:26

2:39

7:42

13:26

1:20

2:29

10:04

1:54

3:21

15:00

6:49

7:41

3:06

13:26

14:36

4:23

15:20

7:30

8:06

17:12

1:58

2:07

4:08

5:23