+
                  setState(() {});

28

+
                });

25
29

26
30

@override

27
31

Widget build(BuildContext context) {

28
32

return Container(

29

margin: const EdgeInsets.only(top: 0),

33

+
                  margin: EdgeInsets.only(top: controller.value),

30
34

child: Container(

31
35

decoration: const BoxDecoration(

32
36

shape: BoxShape.circle,

5. Trigger the animation