working on platfoermer, rather confused

games/platformer/flasher.gd

@@ -0,0 +1,16 @@
+extends Sprite2D
+
+var flash_delay : float = 0.3
+var timer :float = 1
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	timer = flash_delay
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta: float) -> void:
+	timer -= delta
+	if(timer <= 0):
+		visible = !visible
+		timer = flash_delay