Attempting to translate pseudocode to useable code…

scripts/player.gd

@@ -7,6 +7,7 @@ var velocity: Vector2 = Vector2.ZERO
 var shield: int = 0: set = shield_set
 var can_shoot: bool = true
 var is_shooting: bool = false
+var previous_location: float = 0.0
 
 @export var weapon_current : PackedScene
 #var weapon_current = load("res://scenes/stock_weapon.tscn")
@@ -80,6 +81,7 @@ func shoot():
   #if can_shoot: 
   var bullet = weapon_current.instantiate()
   bullet.position = self.position + Vector2(0,-20)
+  previous_location = self.position.y
   get_tree().root.add_child(bullet)
   weapon_rate = bullet.shot_data.rate
   #bullet.global_transform = self.global_transform