-- Revised from Triteleia's script
-- Creates a new image from the given filename
local filename = "white.jpg"
local new_bg = Scene.createSprite(filename, "default", "background")

-- Set a scale that makes it properly match the BG size for that image size
new_bg.scaleX = 320/3
new_bg.scaleY = 320/3

new_bg.layer.addKey(0, "UI")
new_bg.sort.addKey(0, 9999)

new_bg.colorA.addKey(0, 0)
new_bg.alpha.addKey(0, 0)
new_bg.setParent(Scene.hud)

addScenecontrol("whitemask", {"end_timing","alpha","easing"}, function(cmd)
	local timing = cmd.timing
	local end_timing = cmd.args[1]
	local alpha = cmd.args[2]
	local easing = cmd.args[3]

	-- Adds two keys to the alpha value channel associated with the BG
	-- The first key uses the start alpha value and is used to make sure the alpha value of the BG doesn't change
	-- between multiple usages of bgshow on the same BG
	-- The second key is the one that actually changes the BG's alpha to the desired value
	bg_alpha_channels[filename]
	.addKey(timing, start_alpha, easing)
	.addKey(end_timing, alpha)
end)