How do i use repaint and make my graphics move?

In a cellular network each cell is controlled by a tower what are these towers called?

Before you enter an intersection on a green light make sure

Create a program that will take in a single x and y coordinate as the origin. after the input is provided, the output should be all of the coordinates (all 26 coordinates read from the “coordinates.json” file), in order of closest-to-farthest from the origin.