while true do script.Parent.Parent.ServerStorage.BrightRedLava:Clone().Parent = script.Parent end
You forgot to add a wait to the loop. Without this it will run repeatedly with out waiting, causing the game to crash.
while true do script.Parent.Parent.ServerStorage.BrightRedLava:Clone().Parent = script.Parent wait() -- Put a number in the brackets for the length of time to wait for end
Check for an error in the scripting.
For starters, that will instantly crash ROBLOX/Your computer, and even if you add a wait, it will still be really slow, and create infinite copies, in essence.
What is it you are trying to do? And i noticed you kept saying nothing happens, are you in studio? If so, are you using play solo? Scripts will not just run, you have to start a play solo instance.