mouse bool gate with not

extends Node2D

var is_mouse_pressed = false

func _ready():
	set_process(true)

	pass

func _process(delta):
	update()
	pass

func _draw():
	if Input.is_mouse_button_pressed(1) && is_mouse_pressed == false:
		print("one shot only")
		is_mouse_pressed = true
	elif !Input.is_mouse_button_pressed(1):
		is_mouse_pressed = false