added blood effect for spikes.

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Assets/Scripts/Trap.cs

 using UnityEngine;
 using System.Collections;
 
-public class Trap : MonoBehaviour {
+public class Trap : MonoBehaviour
+{
 
-    public int damagePoints = 10;
-    public float respawnTime = 5.0f;
+  public int damagePoints = 10;
+  public float respawnTime = 5.0f;
 
-    // used to store the position while the trap is deactivated
-    private Vector2 realPosition;
+  // used to store the position while the trap is deactivated
+  private Vector2 realPosition;
 
-    void OnTriggerEnter2D(Collider2D other)
-    {
-        if (other.tag == "Player")
-        {
-            other.GetComponent<PlayerHealth>().changeHealthBy(-damagePoints);
+  public GameObject hitEffectPrefab;
+  private Animator hitEffect;
 
-            destroyTrap();
-        }
-    }
+  void Start()
+  {
+    hitEffect = (GameObject.Instantiate(hitEffectPrefab, transform.position, transform.rotation) as GameObject).GetComponent<Animator>();
+  }
 
-    public void destroyTrap()
+  void OnTriggerEnter2D(Collider2D other)
+  {
+    if (other.tag == "Player")
     {
-        realPosition = transform.position;
-        transform.position = new Vector2(100, 100);
-        Invoke("Activate", respawnTime);
+      other.GetComponent<PlayerHealth>().changeHealthBy(-damagePoints);
+      hitEffect.SetTrigger("play"); //play animation.
+      destroyTrap();
     }
+  }
 
-    void Activate()
-    {
-        transform.position = realPosition;
-    }
+  public void destroyTrap()
+  {
+    realPosition = transform.position;
+    transform.position = new Vector2(100, 100);
+    Invoke("Activate", respawnTime);
+  }
+
+  void Activate()
+  {
+    transform.position = realPosition;
+  }
 }

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