Write a Flutter Test Program of no more than 80 lines

using the attached code, get a flutter program working with 2 fields on the screen and when I set the value of the fields, place an icon (any icon) onto the progress bar. Allow for the Map fields to be things like

final Map<int, IconData> points = {
0: Icons.home,
10: Icons.school,
20: Icons.work,
30: Icons.park,
59: Icons.cafe,
62: Icons.movie,
70: Icons.shop,
74: Icons.fitness_center,
86: Icons.pool,
110: Icons.airport_shuttle,
133: Icons.place,
};

And still have the ICON placed in the correct position on the Map