Added everything to 2d, and 3d update

2D/Assets/Scripts/TankAudio.cs

@@ -0,0 +1,34 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class TankAudio : MonoBehaviour
+{
+    public AudioSource m_MovementAudio;
+    public AudioClip m_EngineIdle;
+    public AudioClip m_EngineDrive;
+    public TankMovement tankMovement;
+    public float m_PitchRange = 0.2f;
+    private float m_OriginalPitch;
+
+    private void Start() {
+        m_OriginalPitch = m_MovementAudio.pitch;
+    }
+
+    private void EngineAudio() {
+        //for audio playing
+        if(Mathf.Abs(tankMovement.getMovementInputValue()) < 0.1f && Mathf.Abs(tankMovement.getTurnInputValue()) < 0.1f) {  //if tank is not moving
+            if(m_MovementAudio.clip == m_EngineDrive) {
+                m_MovementAudio.clip = m_EngineIdle;
+                m_MovementAudio.pitch = Random.Range(m_OriginalPitch - m_PitchRange, m_OriginalPitch + m_PitchRange);
+                m_MovementAudio.Play();
+            }
+        } else {
+            if (m_MovementAudio.clip == m_EngineIdle) {
+                m_MovementAudio.clip = m_EngineDrive;
+                m_MovementAudio.pitch = Random.Range(m_OriginalPitch - m_PitchRange, m_OriginalPitch + m_PitchRange);
+                m_MovementAudio.Play();
+            }
+        }
+    }
+}