How would I put this in simpler form?

while true do
	game.Workspace.BrokenCeiling.Sparkle.ParticleEmitter.Enabled = false
	wait(.2)
	game.Workspace.BrokenCeiling.Sparkle.ParticleEmitter.Enabled = true
	wait(.2)
	game.Workspace.BrokenCeiling.Sparkle.ParticleEmitter.Enabled = false
end

People tell me scripting like this is frowned upon. Please tell me how to narrow this down to something more sophisticated?

You can use not to toggle between false and true.

while wait(0.2) do
	game.Workspace.BrokenCeiling.Sparkle.ParticleEmitter.Enabled =  not game.Workspace.BrokenCeiling.Sparkle.ParticleEmitter.Enabled--If this is false then it will be changed to true and if its true then it will be false.
end

~UserOnly16Charcters, Hoped I helped you to answer your question! If you have any further question, don't hesitate to comment below!!

To expand on user's answer a bit, not reverses a boolean value.

print(not true) --> false
print(not false) --> true

Therefore in his example code, you are setting the Enabled property to whatever it doesn't currently equal - to its opposite.

To shorten that annoyingly long path, you can just put this script inside the ParticleEmitter itself, then just use script.Parent;

while wait(0.2) do
	script.Parent.Enabled = not script.Parent.Enabled
end