<Task> Implement cooldown representation on UI bar

[jessfroio]

Description

Task: Implement cooldown representation on UI bar.
Feature: [Skill Tree and Skills] (#167)

The block, dash, dodge, invulnerability and teleport skills have a cool-down period after immediately being used. This cool-down period will be visually represented on the UI bar over these skill icons in the form of a countdown from 5 to 1.

Dependencies

• UI bar display (#xx)
• Skills designed (<Task> Design and optimize skill animations and icons (dynamic) #173)

Milestones

• Appropriate duration for cool-down period should be decided (Sept. 17)
• Design count-down animation (Sept. 17)
• Overlay the count-down animation onto the UI bar when the cool-down period is active (Oct. 2)
• Debug

Completion Deadline: Oct. 4

Documentation

• Main description of feature
• JavaDoc
• ...

Member

• Jess Froio (@jessfroio) (Slack Handle)