Add buttons for the player actions (Attack, Defend, Heal, Run) and a text to print the battle messages. Then implement (or reuse) the battle system from the Intro exercise.

[HerrKermet]

• Player and AI each start with a certain number of hit points (HP). The player's HP should be visible somewhere on the screen.

• Attack deals damage to the enemy. Defend negates all incoming damage. Heal increases your own HP.

• The enemy can also Attack, or it can Charge. This prints a message that the enemy is charging energy. In the following turn a special attack is unleashed.