Day and Night Cycle.

SkullReference

I would like to make a day and night cycle for my island survival game. I'm using canvas modulate for creating a night environment. But right now I'm just directly switching from white(Day color) to Dark blue(Night Color).

I want to smoothen this transition. Is there a way to lerp the values of canvas modulate?

export var NightColor : Color

func _ready():
	_setNight()

	pass # Replace with function body.

func _setDay():
	$Floor/CanvasModulate.color = Color.white
	$TopObjectsSyncLayer/CanvasModulate2.color = Color.white
	$MidLayer/CanvasModulate3.color = Color.white
	$TopObjects/CanvasModulate4.color = Color.white
	

func _setNight():
	$Floor/CanvasModulate.color = NightColor
	$TopObjectsSyncLayer/CanvasModulate2.color = NightColor
	$MidLayer/CanvasModulate3.color = NightColor
	$TopObjects/CanvasModulate4.color = NightColor
# Called every frame. 'delta' is the elapsed time since the previous frame.
#func _process(delta):
#	pass

SkullReference

Okay. So, I finally managed to do it. It turned out to be quite easy:

I just had to use lerp

func _setDay():
	var CanMod = get_tree().get_nodes_in_group("CanvasModulate")
	for n in range(4):
		CanMod[n].color = lerp(CanMod[n].color, Color.white, 0.001)
	
func _setNight():
	var CanMod = get_tree().get_nodes_in_group("CanvasModulate")
	for n in range(4):
		CanMod[n].color = lerp(CanMod[n].color, NightColor, 0.001)