add numberstand to downcount

Assets/Quiz/Scripts/DownCount/LetterStand.cs

@@ -6,4 +6,20 @@ using VRC.Udon;
 
 public class LetterStand : UdonSharpBehaviour
 {
+  public LetterPoint[] letterPoints;
+  public LetterStack[] letterStacks;
+  public GameObject controlPanel;
+
+  public void ResetCards()
+  {
+    foreach (LetterPoint point in letterPoints)
+    {
+      point.heldCard = null;
+    }
+
+    foreach (LetterStack stack in letterStacks)
+    {
+      stack.ResetLetters();
+    }
+  }
 }