simple bouncing horz line

extends Node2D

var y = 0
var yspeed = 1
var screenheight = 200
func _ready():
	set_process(true)

func _process(delta):
	update()
func _draw():

	draw_line(Vector2(0,y),Vector2(200,y),Color(255,0,0))
	y = y + yspeed

	if(y > screenheight):
		yspeed-=1
	if(y < 0):
		yspeed+=1
	print(y)