Decal

local TweenService = game:GetService("TweenService")

local part = Instance.new("Part")
part.Size = Vector3.new(10, 10, 1)
part.Position = Vector3.new(0, 5, 0)
part.Anchored = true
part.Transparency = 1

local decal = Instance.new("Decal")
decal.Face = Enum.NormalId.Front
decal.Texture = "http://www.roblox.com/asset/?id=1145367640" -- white circle
decal.Parent = part

part.Parent = workspace

local redTween = TweenService:Create(
	decal,
	TweenInfo.new(1, Enum.EasingStyle.Linear, Enum.EasingDirection.Out),
	{ Color3 = Color3.new(1, 0, 0) }
)
local greenTween = TweenService:Create(
	decal,
	TweenInfo.new(1, Enum.EasingStyle.Linear, Enum.EasingDirection.Out),
	{ Color3 = Color3.new(0, 1, 0) }
)
local blueTween = TweenService:Create(
	decal,
	TweenInfo.new(1, Enum.EasingStyle.Linear, Enum.EasingDirection.Out),
	{ Color3 = Color3.new(0, 0, 1) }
)

while true do
	redTween:Play()
	redTween.Completed:Wait()
	greenTween:Play()
	greenTween.Completed:Wait()
	blueTween:Play()
	blueTween.Completed:Wait()
end

-- create part
local part = Instance.new("Part")
part.Size = Vector3.new(5, 1, 5)
part.Position = Vector3.new(0, 0.5, 0)
part.Anchored = true
part.TopSurface = Enum.SurfaceType.Smooth
part.BrickColor = BrickColor.new("Toothpaste")

-- create decal
local decal = Instance.new("Decal")
decal.Face = Enum.NormalId.Top
decal.Parent = part

-- create sound
local sound = Instance.new("Sound")
sound.SoundId = "rbxasset://sounds/uuhhh.mp3" -- oof
sound.Parent = part

-- define faces
local happyFace = "http://www.roblox.com/asset/?id=26424652"
local sadFace = "http://www.roblox.com/asset/?id=147144198"

decal.Texture = happyFace

-- touched event
local cooldown = false
part.Touched:Connect(function(hit)
	if not cooldown then
		if hit and hit.Parent then
			cooldown = true
			sound:Play()
			decal.Texture = sadFace
			task.wait(1)
			decal.Texture = happyFace
			task.wait(0.2)
			cooldown = false
		end
	end
end)

-- add to workspace
part.Parent = workspace

local TweenService = game:GetService("TweenService")

local part = Instance.new("Part")
part.Size = Vector3.new(10, 10, 1)
part.Position = Vector3.new(0, 5, 0)
part.Anchored = true
part.Transparency = 1

local decal = Instance.new("Decal")
decal.Face = Enum.NormalId.Front
decal.Texture = "http://www.roblox.com/asset/?id=699259085" -- roblox logo
decal.Parent = part

part.Parent = workspace

local tween = TweenService:Create(
	decal,
	TweenInfo.new(1, Enum.EasingStyle.Linear, Enum.EasingDirection.Out, -1, true),
	{ Transparency = 1 }
)

tween:Play()