There is a certain threshold that the user is targeting. If the user's step is within a certain range of the threshold turn the box green, if it gets farther away, make it yellow etc.

Acceptance Criteria:

• Backend sends calculation to the front end

• On backend message, frontend finds the range the result is in

• Box on React app changes to match the range

• The borders of the left and right boxes take shades of red for every calculation done for which force was below threshold

• The borders of the left and right boxes take shades of yellow for every calculation done for which force was at or above threshold but step time was below target zone

• The borders of the left and right boxes take shades of green for every calculation done for which step time was at or above target zone