Example using progress bar

Progress.gd

extends TextureProgress

onready var Signals = get_node("/root/Signals")

func _ready():
	Signals.connect(Signals.UPDATE_ENERGY_EVENT_NAME, self, "updateValue")
	#self.size_flags_vertical |= SIZE_EXPAND


func _draw():
	
	var transform = get_global_transform()
	var scale = transform.get_scale()
	scale.x = min(scale.x, 0.5)
	scale.y = min(scale.y, 0.5)
	transform = transform.scaled(scale)
	draw_set_transform(transform.get_origin(), transform.get_rotation(), scale)
	pass
	

func updateValue(value):
	set_value(value)