88 — Time: a stopwatch and cooldowns

Games keep needing two things: how long did that take, and you cannot do that again yet. Both are sentences.

#Steps

1. Make timer.nme:

   start the timer
   wait 3 seconds
   show elapsed
   

   copyrun it →

   A number close to 3.0 appears. Korean is 시간 재기 시작해 and 잰시간 말해줘.

2. elapsed is a value, so it goes wherever a value goes. Store it:

   start the timer
   wait 1 second
   set spent to elapsed
   show spent
   

   copyrun it →

   Or put it in a condition:

   start the timer
   if elapsed is greater than 10
       show That took too long
   end
   

   copyrun it →

3. Reading elapsed without starting the timer is refused while compiling. If you see error E0226, add start the timer on an earlier line.

4. A cooldown means "this cannot happen again for a few seconds". Give it a name:

   put attack on cooldown for 3 seconds
   

   copyrun it →

   Korean is 공격 쿨타임 3초 걸어.

5. Ask whether it is over:

   put attack on cooldown for 3 seconds
   when attack is on cooldown
       show Not yet
   end
   

   copyrun it →

   The opposite is when attack is ready. Korean is 공격 쿨타임이 남았으면 and 공격 쿨타임이 끝났으면.

6. Or wait it out:

   put attack on cooldown for 2 seconds
   wait for attack
   show You can attack now
   

   copyrun it →

   Korean is 공격 쿨타임 끝날때까지 기다려.

#Try it

Put a door on cooldown, wait for it, and show how long it took:

start the timer
put door on cooldown for 2 seconds
wait for door
show The door opened
show elapsed

#What you learned

• start the timer / 시간 재기 시작해 starts the stopwatch.
• elapsed / 잰시간 is the seconds since it started. It is a value, so it goes anywhere a value goes.
• put attack on cooldown for 3 seconds / 공격 쿨타임 3초 걸어 sets a cooldown.
• when attack is ready / is on cooldown asks about it.
• wait for attack / 공격 쿨타임 끝날때까지 기다려 sleeps out what is left.
• Cooldowns are named, so several can run at once and each is counted separately.