red square fade to black back to red

extends Node2D

var color = 0
var colormult = .01


func _ready():
	set_process(true)

	pass

func _process(delta):
	update()
	pass

func _draw():

	draw_rect(Rect2(color*200,0,100,100),Color(color,0,0))
	color += colormult
	if color > 1 ||  color < 0:
		colormult = colormult * -1
	print(color)
	pass