[Answered] Cannot Make Boost Turn off

I'm having difficulties with getting boost to turn off. After adding the Timer and adjusting the wait time to 0.6 and turning the One Shot to "On" the boost still refuses to slow down once the Spacebar is released. I've double-checked my coding at this point and everything seems to be correct.

extends Sprite

var boost_speed := 1500.0

var normal_speed := 600.0

var max_speed := normal_speed

var velocity := Vector2.ZERO

func _process(delta: float) -> void:

 var direction := Vector2.ZERO

 direction.x = Input.get_axis("move_left", "move_right")

 direction.y = Input.get_axis("move_up", "move_down")

 if direction.length() > 1.0:

  direction = direction.normalized()

 if Input.is_action_just_pressed("boost"):

  max_speed = boost_speed

  get_node("Timer").start()

 velocity = direction * max_speed

 position += velocity * delta

 if direction:

  rotation = velocity.angle()

I would greatly appreciate any help that could be offered.

UPDATE: Thanks to everyone for your help, my mistake was typing that portion out longhand instead of going by the instructions.