pong: let bot idle last longer

src/pong.ts

@@ -45,6 +45,7 @@ class Paddle {
     isLeft: boolean;
     score: number;
     dy: number;
+    idleCounter: number;
 
     constructor(_geometry: Box, _isLeft: boolean) {
         this.geometry = _geometry;
@@ -53,6 +54,7 @@ class Paddle {
         this.isBot = true;
         this.score = 0;
         this.dy = 0;
+        this.idleCounter = 0;
     }
 
     scored() {
@@ -254,6 +256,10 @@ class PongCore {
 
     // Randomly move the bot paddle when ball not towards it
     botIdle(player: Paddle) {
+        if (player.idleCounter < 10) {
+            player.idleCounter++;
+            return;
+        }
         let direction: number = Math.floor(Math.random() * 3);
         switch (direction) {
             case 0: