missile enemy plan

thinkitout.txt

Missile Enemy
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What do I need?
  Missile Enemy Sprite
    2D rigidbody
    2D box collider
    MissleEnemy script
    
  Red Missile
    2D rigidbody
    2D box collider
    EnemyMissle script

What will happen?
Missile Enemy will spawn
  Move Down.
  Zig-Zag movement
  Destroy itself after a certain point.
  if enemy is hit
    destroy enemy
    explosion
  
The Red Missile will spawn
  figure out the distance between the player and the missile itself.
  rotate and move towards the player
  if missile collides
    explode
    distroy itself and collided