Added fire mode select on gun script

scripts/bullet3.gd

@@ -0,0 +1,23 @@
+extends AnimatableBody3D
+
+
+const SPEED = 30.0
+
+@onready var mesh = $MeshInstance3D
+@onready var ray = $RayCast3D
+@onready var particles = $GPUParticles3D
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	pass # Replace with function body.
+
+
+# Called every frame. 'delta' is the elapsed time since the previous frame.
+func _process(delta):
+	
+	
+	position += transform.basis * Vector3(0, 0, -SPEED) * delta
+
+
+func _on_timer_timeout():
+	queue_free()